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
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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
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