Question

a classroom is 12 m long 7 metre wide and 4 metre high find the cost of repairing this wall of ceiling at the rate of rs 15 pet square metre

Answer 1

Length =12m
Width=7m
Height=4m
area of ceiling =length * breadth
= 12*7
=84m2

Cost of 1m repairing=15
cost of repairing 84 M = 84*15
=1260