Math, asked by patelrs470p8wse5, 1 year ago

the Length breadth and height of a room are 5 M 4 m and 3 M respectively find the cost of whitewashing the inner of the room and sealing at the rate rupees 50 per square metre

Answers

Answered by hdewangan
13
l = 5m
b = 4m
h = 3m

Area of inner room with ceiling =
2(bh + hl) + lb \\  = 2(4 \times 3 + 3\times5) + 5 \times 4 \\  = 2(12 + 15) + 20 \\  = 2(27) + 20 \\  = 54 + 20 \\  = 74 {m}^{2}
Cost of whitewashing 1 sq. m = 50

Cost of whitewashing 74 sq. m =

74×50

= Rs3700

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