the outer diameter of a gas cylinderis 20 cm find the cost of the painting of its outer curved surface at rs 4per square cm if height of cylinder is 70 cm
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c.s.a of cylinder = 2πrh
= 2 × (22/7) x 10 × 70
= 4400 cm
painting outer curved surface area
4400 × 4 = Rs 17600
= 2 × (22/7) x 10 × 70
= 4400 cm
painting outer curved surface area
4400 × 4 = Rs 17600
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