Question

Find the value of the rectangular well 28 deep Base dimensions are 10 metre and 8 metre and also find the cost of plastering its vertical wall at the rate of 15 metre square​

Answer 1

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★ V = l × b × h

• = 10 × 8 × 28
• = 2240m²

★ L.S.A = 2h( l + b)

• = 2(28) (10 + 8)
• = 56 (18) = 1008m²

• 1m² = ₹15
• 1008m² = ?

★ 1008 × 15 = 15,120

Therefore, The cost of plastering its vertical at the rate of 15m² is ₹15,120.

Answer 2

★V = l × b × h

= 10 × 8 × 28

= 2240m²

L.S.A = 2h( l + b)

= 2(28) (10 + 8)

= 56 (18) = 1008m²

1m²= ₹15

1008m²= ?

★ 1008 × 15 = 15,120

therefore

The cost of plastering its vertical at the rate of 15m² is ₹15,120

Additional Information

★ L.S.A = Lateral surface area of rectangle = 2h(l + b)

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