Question

the cost of papering the Wall of a room 12 metre long and 8 metre board at 80 paise per square metre is rupees 160 find its height​

Answer 1

Answer:

height=4.6 m

Step-by-step explanation:

length of the room;l=12 m

breadth of room ;b= 8m

rate of paper=80 paise per square meter

cost of papering=160 rs

area to be papered =2(l+b)h+lb

=2(12+8)h+12*8

=2(20)h+96

= 40 h+96

cost of papering=(40h+96)(80/100)

160=32h+76.8

160-76.8=32h

83.2=32h

83.2/32=h

4.6 m =h

hence height =4.6 m