Question

At a particular time of a day, a 7 high flagstaff castes a shadow which is 8.2 my long. what is the height of the building which castes a shadow 20.5 metres in length at the same moment? Answer is 17.5 m

Answer 1

Answer:

The height of the building which caste a shadow 20.5 m in length is 17.5 m.          

Step-by-step explanation:

Given : At a particular time of a day, a 7 high flagstaff castes a shadow which is 8.2 m long.

To find : What is the height of the building which castes a shadow 20.5 meters in length at the same moment?

Solution :

A 7 high flagstaff castes a shadow which is 8.2 m long.

i.e. Shadow of length 8.2 m = 7 m

The shadow of length 1 m = $\frac{7}{8.2}$ m

The shadow of length 20.5 m = $\frac{7}{8.2}\times 20.5$ m

The shadow of length 20.5 m = 17.5 m

Therefore, The height of the building which caste a shadow 20.5 m in length is 17.5 m.

Answer 2

Answer:

a7 high flagstaff of castes a shadow which is 8.2 m long

ie shadow of length 1m = 7_82 m

the shadow of length 20.5 =7 _8.2 ×20.5m

the shadow of length 20.5 =17.5

*the height of the building which caste a shadow 20.5 m in length is 17.5