Question

12. At a particular time of a day, a 7-m-high flagstaff casts a shadow which is 8.2 m long .what is the height of the building which cast a shadow 20.5 in length at same moment.​

Answer 1

★Given:-

• At a particular time of a day, a 7-m-high flagstaff casts a shadow which is 8.2 m long .
• A building which casts a shadow of 20.5 in length at same moment.​

★To find:-

• The height of the building.

★Solution:-

Given,A 7m high flagstaff casts a shadow which is 8.2m long.

Let x m high flagstaff casts a shadow which is 1m long.

Then, x = 7/8.2m

Now,

Shadow of length 20.5m is casted by building of height:-

➺x(20.5)

➺(7/8.2)(20.5)

➺17.5m

Therefore,the height of building is 17.5m.

_______________