Question

How many brick each 25cm long 10cm wide and 7.5cm thick, will be required for wall 15m long 2.5cm hight and 1.25m thick.

Answer 1

40

Step-by-step explanation:

area of brick =l×b×h

=25×10×7.5

= 1875

area of wall = l×b×h

= 15×2.5×1.25

= 46.875

area required = 1875÷46.875

= 40

40 is the answer

Answer 2

Step-by-step explanation:

first we have to find area of brick and wall

then divide the area of brick with the area of the wall

so, we get how many bricks are required