Question

find the cost of painting 3 iron boxes at the rate of rs 5 per metre square whose dimension are 1.5 m *0.85* 0.20 and 2m *0.65 *0.35 and 2m*0.90*0.45 metre​

Answer 1

Answer:

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Step-by-step explanation:

Find the total surface area of the 3 boxes:

Box 1 = 2(1.5 x 0.85 + 0.85 x 0.2 + 0.2 x 1.5) = 3.49 m²

Box 2 = 2(2 x 0.65 + 0.65 x 0.35 + 0.35 x 2) = 4.455 m²

Box 3 = 2(2 x 0.9 + 0.9 x 0.45 + 0.45 x 2) = 6.21 m²

Total area = 3.49 + 4.455 + 6.21 =14.155 m²

Find the cost:

1 m² = Rs 5

4.155 m² = 5 x 14.155

4.155 m² = Rs 70.78