please solve 10 question
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A = 2h(l + b)
Area of room = 2*6.5(15.35 + 4.65) = 260
Area of 4 doors = 4lb = 4 * 1.5 * 1.3 = 7.80
Area of 3 windows = 3 * 1.5 * 1.2 = 5.40
Area of the wall for whitewashing = 260 - (7.8 + 5.4) = 246.80
Cost for whitewashing = 246.80 * 3.4 = Rs. 839.12
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