Question

Find the length of a lane 5m wide which can be covered by 50000 bricks of size 22cm by 15cm

Answer 1

let length of lane be x m
width= 5m
so, area of lane= 5x m^2
area of 1 brick = (22/100×15/100) m^2
= 0.22×0.15 m^2
area of 50000 bricks= 0.22×0.15×50000
= 22×15×5
= 1650 m^2
since 50000 bricks cover the entire area therefore, are of all bricks= area of lane
so, 1650= 5x
so, x= 1650/5
x= 330
therefore, length of lane is 330 m