If the sum of the radius and the height of a closed cylinder is 45 cm and the total surface area of the cylinder is 1540cm2, then the circumference of the base of the cylinder is:
A
66 cm
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B
44 cm
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C
56 cm
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D
Can't be determined
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Solution
The correct option is B 44 cm 2πr(r+h)=1540cm2and(r+h)=35cm∴2πr=154035=44cm