Question

The cost of preparing the walls of a room15mlong at the rate of₹16.5 per square meter is ₹6336and the cost of matting the floor at880paise per square metreos₹1188. Find the height of the room.

Answer 1

Answer:

$\huge\fbox{☘Answer}$

Let height of room = h 

width of room = w 

⇒ Area of walls =2(lh+wh) 

=2h(l+w)

cost of papering walls =2h(l+w)(0.95)=212.80

⇒h=112/ltw

Area of floor  = lw 

⇒ \cost =0.50lw=97.50

⇒lw=195⇒w=15195=13

⇒h=112/28=4m