Asked by preet
a long with a diameter of 60cm and 3m in length. its hollow centre is 20 cm in diameter. find the surface area of the long in cm2, including the ends and the inside, correct to one decimal place
Answers
Answered by
oobleck
each circular end has area π(30^2 - 10^2)
the curved length has area 2π(30+10)*300
the curved length has area 2π(30+10)*300
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