Question

9. A 5 m wide lane was paved with
bricks of size 20 cm by 15 cm. If the rate
of bricks was *750 per thousand and if
bricks worth 49500 were used for
pavement, find the length of the lane.​

Answer 1

Area of one brick = $20 \times 15 = 300 cm^{2}$

Bricks which cost Rs. 750 = 1000

Bricks in Rs. 49500 = 66000

let the length of the lane(l) be $x$ cm.

breadth = 5m = 500 cm

$66000 \times 300= 500 \times l$

$l = 39600 cm = \boxed{396 m}$