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A rectangle of length 14 cm and breadth 7 cm is folded into a right circular cylinder. How many revolutions does the cylinder need to make to cover an area of 784 sq.Cm

User EarlyRiser
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1 Answer

17 votes
17 votes

Answer:

n = 8

Explanation:

Given that,

Length and breadth of a rectangle are 14 cm and 7 cm.

The area of rectangle is given by :


A=l* b\\\\A=14* 7\\A=98\ cm^2

Let n be the number of revolutions the cylinder need to make to cover an area of 784 sq.cm.

So,


n=(784)/(98)\\\\n=8

Hence, there are 8 revolutions.

User Suzy
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