Question

a path 20m long and 15m wide is to be laid with bricks of length 20cm and breadth 10cm find the no of bricks required

Answer 1

find area of path:
20m x 15m = 300m²

find area of bricks:
0.2m x 0.1m = 0.02m²

divide area of path by area of bricks:
300/0.02 = 15,000 bricks

Answer 2

area of path=l×b
=20×15
=300sq m=30000sq cm
brovk is cuboid so irs upper part rectangular
so area of rectangle=l×b
=20×10
=200sq cm
no of bricks=area of path/area of brick
=30000/200
=150