Question

how do i do these questions?

Answer 1

Answer:

b) answer is 18 m should be the length of ladder.

Step-by-step explanation:

length of ladder= 15m

length of its shadow= 20m

let length of building be x.

length of building's shadow= 24m

Atq:

15:20::x:24

product of extremes = product of means

15 × 24 = 20 × x

x = 15 × 24 / 20

x = 360/20

x= 18

hence the length of building is 18 m then length of ladder required = 18 m