The cost of painting the outer curved surface of a cylinder is rupees 0.75 CM square is rupees 165 if the height of a cylinder is 1 m find the radius of its base
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Radius=0.35cm
Explanation:
Curved Surface area of cylinder=2πrh
Height= 1m= 100 cm
Cost of painting= 0.75 Rs.
Total cost= 15 Rs.
= 2πrh× 0.65= 165
= 2× 22× r× 100× 0.75/7= 165
r= 7/20 cm
r= 0.35 cm
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