Question

at a particular time of a day,a 7m high flagstaff casts a shadow which is 8m long.what is the hight of the building which casts a shadow 20.5meters in length in same moment?

Answer 1

Given shadow of length 8m = 7m

Then the shadow of length 1m = 7/8m.

Then the height of the building with 20.5 meters = 7/8 * 20.5

                                                                                   = 17.9.