Answers

2015-09-24T14:28:36+05:30

This Is a Certified Answer

×
Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Let the length of room = l = 12 m
breadth of room = b m
height of room = h m

Cost of matting the floor @ Re. 0.85 per m² = Rs. 91.80
floor area = 91.80 / 0.85 = 108 m²
⇒ l × b = 108
⇒ 12 × b = 108
⇒ b = 108/12
⇒ b = 9 m

cost of papering wall @ Rs. 1.35 per m² = Rs. 340.20
wall area is the lateral surface area.
wall area = lateral surface area = 340.20 / 1.35 = 252 m²
⇒ 2h(l+b) = 252
⇒ 2h(12+9) = 252
⇒ 2h×21 = 252
⇒ h = 252/(2×21) 
⇒ h = 6 m

Height of room is 6m.
0