Question

7mm high flagstaff have a shadow which is 8.2 m long what is the height of the building which casts a shadow 20.5 m in length at that same moment .
Please answer using unitary method

Answer 1

Answer:

height = 7m

length of the shadow =8.2m

length of the shadow of the building = 20.5 m

we have to find the height of the building by unitary method

Step-by-step explanation:

let the height of the building be x

7–8.2

x–20.5

x=7*20.5/8.2

x=143.5/8.2

x=1435/82

x=17.5m

I hope it's clear

the height of the building is 17.5 m