find the cost of painting 3 iron boxes at the rate of rs5 per square metre, whose dimension are 1.5m×0.85m×0.20m, 2m×0.65m×0.35m and 2m×0.90m×0.45m answer= rs 70.78
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1.5×0.85×0.20
area =0.255m^2
2×0.65×0.35
area2=0.455m^2
area3=0.81m^2
0.255+0.455+0.81
=1.52m^2
cost of painting = 1.52÷5
=0.304rs
area =0.255m^2
2×0.65×0.35
area2=0.455m^2
area3=0.81m^2
0.255+0.455+0.81
=1.52m^2
cost of painting = 1.52÷5
=0.304rs
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