A room is constructed such that its external length and breadth are 7.5m and 5.3m respectively. The thickness of the wall is 15cm and its height...

A room is constructed such that its external length and breadth are 7.5m and 5.3m respectively. The thickness of the
wall is 15cm and its height is 3.3 metres. A total space of 5m² is left for doors and windows on the walls.
a) Calculate the volume of:
(i) the materials needed to construct the walls without the doors and windows.
(ii) the materials needed to construct the walls with doors and windows.
b) The blocks used in constructing the walls are 450mm by 200mm by 150mm. 0.225m³ of cement is used to join the
blocks. Calculate the number of blocks. Calculate the number of blocks needed to construct the room.

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sharon kalunda answered the question on May 3, 2019 at 10:58

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