30. A wall 6 m long, 5 m high and 0.5 m thick is to be constructed wit

1.	30. A wall 6 m long, 5 m high and 0.5 m thick is to be constructed with bricks, each having lenacth25 cm, breadth 12.5 cm and height 7.5 om. Find the mumber of bricks required to conste thwall, if it is given that cement and sand mixture occupy of the volume of the wall.
Answer» Volume of wall=length×breadth×height=6×5×0.5 m³=15 m³ Volume of 1 brick= 0.25×0.125×0.075 m³= 0.000234 m³ Number of bricks required=15/0.00234=64102 bricks

30. A wall 6 m long, 5 m high and 0.5 m thick is to be constructed with bricks, each having lenacth25 cm, breadth 12.5 cm and height 7.5 om. Find the mumber of bricks required to conste thwall, if it is given that cement and sand mixture occupy of the volume of the wall.

Answer»

Volume of wall=length×breadth×height=6×5×0.5 m³=15 m³

Volume of 1 brick= 0.25×0.125×0.075 m³= 0.000234 m³

Number of bricks required=15/0.00234=64102 bricks