Question

Radius of a cylinder is 2.1 cm and height 5 cm. Find cost of painting its CSA at rate of Rs.15/cm2​

Answer 1

Answer:

Rs. 990

Step-by-step explanation:

C.S.A. = 2 × 22/7 × r × h = 2 × 22/7 × 2.1 × 5 cm^2 = 66 cm^2

Cost of Painting = Rs. 15 × 66 = Rs. 990

Answer 2

Answer:

₹ 990

Step-by-step explanation:

2 pie r h

2× 22/7 ×2.1 ×5

44×1.5

66cm²

rate of Rs.15/cm2

rate = 15 × 66

Rate of Painting is ₹990

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