Question

A verandah of width 2.25 m is constructed all along outside a room which is 5.5 m long and 4 m wide. Find: the area of the verandah : the cost of cementing the floor of the verandah at the rate of Rs 200 per m². The area of verandah with room (Fig KLMN)

Answer 1

l = length = 5.5 + 2.25 + 2.25 = 10 m

b = breadth = 4 + 2.25 + 2.25 = 8.5 m

∴ Area 10 × 8.5

= 85 sq cms.

Area of room = l × b

l = 5.5 m = 5.5 × 4 N

∴ Area of verandah = Area of KLMN – Area of room

= 85 – 22 = 63 sq mts

Cost of cementing the floor = Rs 200 / sq m

Total cost of cementing = 63 × 200

= Rs 12,600