The internal measurements of a cuboidal room are 10×8×4. On one of its wallsthere is a window, the measurement of which is 2×1.5. Find the cost of white washing the four walls of the room (leaving the window) at the rate of ₹55per sq. m.Also, find how many liters of paint will be required to paint these walls if 0.650paint can cover 12of area.
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The dimensions of room is 12×8×4
The Lateral surface area is
2h(l+b)
2(4)(12+8)
8×20=160m
2
Cost of white wash is 5m
2
Total cost is 5×160=800Rs,
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