Question

hlo friends❤❤
..........


please solve it


A basketball ground is 28m long and 45 m wide. A 5m
wide gallery for spectatords has to be built on all its
sides of the ground. Find the area of the spectator gallery
and the cost of making that gallery at Rs5.25 per
square meter?​

Answer 1

First, we will find the area of the whole ground. As the length of the ground is 45 m and breadth of the ground is 28 m.

Area of Ground (rectangle) - l * b

= 45 * 28

= 1260 m²

Given :

A 5m wide gallery for spectators has to be built on all its sides.

So, the length and breadth of the inner rectangle excluding the gallary :

L = 28 - 5 - 5 = 18 m ;

B = 45 - 5 - 5 = 35 m

Now, if we will minus the Area of the inner rectangle by the whole rectangle we will get the area of the gallery only.

So,

Area of Inner rectangle = l * b

= 18 * 35

= 630 m²

Area of inner rectangle - Area of outer rectangle = Area of gallery

1260 - 630

= 630 m²

Cost of making the gallery at 5.25 per m² :

= 5.25 * 630

= 3307.5