Question

A room 12.5 m long and 8 m wide is surrounded by a 1 m wide verandah calculate the cost of cementing the floor of this verandah at rupees 20 per m square.

Answer 1

length of room =12.5
breath " """""=8
area = l×b=100
length of barah. =12.5 +1+1 =14.5
breath of barah.=8+1+1 =10
area of barah. including room=l×b=14.5×10
145 ,area of only barah.=area of room-area of barah.including =145 -100=45,
cost of cementing = 45× 20 =900