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.

12. At a particular time of a day, a 7-m-high flagstaff casts a shadow

1.	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» - 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 = 7/8.2mNow, Shadow of length 20.5m is casted by building of height:- ➺x(20.5)➺(7/8.2)(20.5) ➺17.5mTherefore,the height of building is 17.5m._______________