Question

The length breadth and height of a room is 5 metre 4 metre and 3 the cost of whitewashing its four wall @ rupees 7.5 per metre square is
A. Rs 110
B. Rs 109
C. Rs 220
D. Rs 105

Answer 1

Step-by-step explanation:

dimensions of the room=5m,4m,3m

so, lateral surface area of the room =2h(l+b)

A/q-: 2 into 3(5+4)=6 into 9= 54m2

so, cost of white-washing=54 into 7.5=555 ruppes

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