Study resources on Kenyaplex

Get ready-made curriculum aligned revision materials

Exam papers, notes, holiday assignments and topical questions – all aligned to the Kenyan curriculum.

Or go directly to:

Class notes Holiday assignments Topical questions Other resources

Water and ethanol are mixed such that the ratio of the volume of water to that of ethanol is 3: 1. Taking the density of...

Water and ethanol are mixed such that the ratio of the volume of water to that of ethanol is 3: 1. Taking the density of water as 1 g/cm³ and that of ethanol as 1.2g/cm³, find the mass in grams of 2.5 litres of the mixture.

Answers

sharon kalunda answered the question on August 7, 2019 at 09:22

Answer Attachments

Next: Find three quarters of the result and leave your answer as a fraction.

Previous: Express the following recurring decimal as a fraction in its simplest form

View more Mathematics Questions and Answers | Return to Questions Index

Exams With Marking Schemes

Related Questions

Find three quarters of the result and leave your answer as a fraction. (Solved)

Divide then add the result to the product of Find three quarters of the result and leave your answer as a fraction.

Date posted: August 7, 2019 . Answers (1)
Mwangi and Otieno live 60km apart. Mwangi leaves his home at 7.00am cycling towards Otieno’s house at 20km/h. Otieno leaves his home at 8.00am cycling... (Solved)

Mwangi and Otieno live 60km apart. Mwangi leaves his home at 7.00am cycling towards Otieno’s house at 20km/h. Otieno leaves his home at 8.00am cycling towards Mwangi’s house at 8km/h

a) At what time did they meet?
b) How far is the meeting point from Mwangi’s house?

Date posted: August 7, 2019 . Answers (1)
Two lines L1 and L2 intersect at a point P. L1 passes through the points (-4,0) and (0,6). Given that L2 has the equation: y... (Solved)

Two lines L1 and L2 intersect at a point P. L1 passes through the points (-4,0) and (0,6). Given that L2 has the equation: y = 2x – 2, find, by calculation, the coordinates of P.

Date posted: August 7, 2019 . Answers (1)
The L.C.M. of three numbers is 360 and the G.C.D of the same numbers is 2. If one of the numbers is 40. find the other... (Solved)

The L.C.M. of three numbers is 360 and the G.C.D of the same numbers is 2. If one of the
numbers is 40. find the other 2 numbers.

Date posted: August 7, 2019 . Answers (1)
Find the value of x in the following equations: (Solved)

Find the value of x in the following equations:

Date posted: August 7, 2019 . Answers (1)
Write the odd numbers in descending order between 1 and 10 inclusive (Solved)

a) Write the odd numbers in descending order between 1 and 10 inclusive
b) Round off the number formed to 3 significant figures.
c) Find the total value of digit 7 in the new number in 1(b) above.

Date posted: August 7, 2019 . Answers (1)
Evaluate the expression below (Solved)

Evaluate the expression below

Date posted: August 7, 2019 . Answers (1)
An arithmetic progression has the first term as a and common difference as d (i) Write down the third, ninth and twenty fifth term of the... (Solved)

An arithmetic progression has the first term as a and common difference as d
(i) Write down the third, ninth and twenty fifth term of the progression
(ii) The arithmetic progression above is such that it is increasing and the third, ninth and twenty fifth terms form the first three consecutive terms e.g. a geometric progression. If the sum of the seventh term and twice the sixth term of the A.P is 78.Calculte the first term and the common difference of A.P.

Date posted: August 7, 2019 . Answers (1)
Every time an insect jumps forward the distance covered is half of the previous jump. If the insect initially jumped 6.4m. Calculate (i) The length of 7^th... (Solved)

Every time an insect jumps forward the distance covered is half of the previous jump.
If the insect initially jumped 6.4m. Calculate
(i) The length of 7^th jump
(ii) The total distance covered after the 7^th jump

Date posted: August 7, 2019 . Answers (1)
In the figure below ABCDE is a pentagon inscribed in a circle. CX is a tangent to the circle at C and EDX is a... (Solved)

In the figure below ABCDE is a pentagon inscribed in a circle. CX is a tangent to the circle at C and EDX is a straight line. Angle ADE = 34⁰, angle CAD = 42⁰, AB = BC and BC is parallel to AD. Giving reasons, determine

(a) (i) Angle ABC
(ii) Angle ACD
(iii) Angle EAD
(iv) Angle CXD
(b) Given that ED = 5cm, DX = 4cm, calculate the length of CX

Date posted: August 7, 2019 . Answers (1)
The figure below shows two circles intersecting at C and D. The centres are A and B with radii 8cm and 6cm respectively. AB =... (Solved)

The figure below shows two circles intersecting at C and D. The centres are A and B with radii 8cm and 6cm respectively. AB = 10cm.

Determine
(i) Size of angle DAC
(ii) Size of angle DBC
(iii) Area of sector ACMD
(iv) Area of the shaded region

Date posted: August 7, 2019 . Answers (1)
Construct a parallelogram ABCD in which AB = 8.5cm, AD = 6cm and angle BAD = 75⁰.(Use a ruler and pair of compasses only in... (Solved)

Construct a parallelogram ABCD in which AB = 8.5cm, AD = 6cm and angle BAD = 75⁰.(Use a ruler and pair of compasses only in this question)
(a) Measure the length of AC
(b) On the same diagram, construct
(i) a perpendicular from B to line AD at M. Measure BM. Hence calculate the area of the parallelogram ABCD.
(ii) The locus of a point x which moves such that it is equidistant from A and C
(iii) The locus of point Y which moves such that angle BYD = 90⁰

Date posted: August 7, 2019 . Answers (1)
A plastic water tank has a shape as shown below, with a frustrum of a cone on top, a cylindrical body and a hemispherical bottom. (a)... (Solved)

A plastic water tank has a shape as shown below, with a frustrum of a cone on top, a cylindrical body and a hemispherical bottom.

(a) Calculate
(i) The volume of the tank in m³.
(b) A filler pipe takes 3 hours to fill a third of the tank. If the tank is already ¼ full, at what time will the filler pipe fill the tank if the pipe is opened at 9.00 a.m.
(c) A particle falls in the tank. If its chances of being in any part of the tank are equally likely, find the probability of it being in the hemispherical part.

Date posted: August 7, 2019 . Answers (1)
The figure below represents a school field. Find the length of AB given that angle BAD and angle CBD are right angles. (Solved)

The figure below represents a school field.

Find the length of AB given that angle BAD and angle CBD are right angles.

Date posted: August 7, 2019 . Answers (1)
Solve for x in the equation (Solved)

Solve for x in the equation

Date posted: August 7, 2019 . Answers (1)
The interior angle of a regular polygon is 9 times the exterior angle. How many sides does the polygon have? (Solved)

The interior angle of a regular polygon is 9 times the exterior angle. How many sides does the
polygon have?

Date posted: August 7, 2019 . Answers (1)
The figure below shows a net of a circular cone with a lid. Given that angle AOB = 150⁰ and OA = 14cm. Determine (a) The radius... (Solved)

The figure below shows a net of a circular cone with a lid. Given that angle AOB = 150⁰ and OA = 14cm.

Determine
(a) The radius of the base of the cone
(b) The total surface area of the cone

Date posted: August 7, 2019 . Answers (1)
From a survey carried out the following information was entered in a field book (Solved)

From a survey carried out the following information was entered in a field book

If XY is 360m and SM, RP and QN are the offsets. Determine the area of the field in metres.

Date posted: August 7, 2019 . Answers (1)
Draw line PQ = 7.0cm. Locate a point R on line PQ such that PR:RQ = 3:4 (Solved)

Draw line PQ = 7.0cm. Locate a point R on line PQ such that PR:RQ = 3:4

Date posted: August 7, 2019 . Answers (1)
Three people Makori, Ondieki and Mosomi contributed money to start a business. Makori contributed a quarter of the total amount and Ondieki two fifth of... (Solved)

Three people Makori, Ondieki and Mosomi contributed money to start a business. Makori contributed a quarter of the total amount and Ondieki two fifth of the remainder. Mosomi’s contribution was one and half times that of Makori. They borrowed the rest of the money from the bank which was sh. 60,000 less than Mosomi’s contribution. Find the total amount required to start the business.

Date posted: August 7, 2019 . Answers (1)