Find the cost of painting a tank of dimension 3 m - 2 m - 1-5 m at -20 per square metre-

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Standard VIII

Mathematics

Total Surface Area of a Cuboid

Find the cost...

Question

Find the cost of painting a tank of dimension $3 m \times 2 m \times 1.5 m$ at ₹20 per square metre .

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Solution

Given: Length = 3m
Breadth = 2m
Height = 1.5m
Cost of painting=Rs.20/ $m^{2}$

To find:-
Cost of painting the tank
TSA (Total surface area) = 2 (lb + bh + lh)

TSA (Total surface area) = 2 × [(3)(2) + (2)(1.5) + (3)+(1.5)

TSA (Total surface area) = 2 × (6 + 3 + 4.5)

TSA (Total surface area) = 2 × 13.5

TSA (Total surface area) = $27 m^{2}$

Cost of painting = TSA × 20
Cost of painting = 27 × 20
Cost of painting = Rs.540

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Find the cost of painting a tank of dimension 3 m×2 m×1.5 m at ₹20 per square metre .

Find the cost of painting a tank of dimension $3 m \times 2 m \times 1.5 m$ at ₹20 per square metre .