A circular pen has an area of #49pi# square yards. What is the diameter of the pen?

1 Answer
Nityananda
Jun 7, 2017

14 yards

Explanation:

We know area of circular pen = #pi*r^2# sq unit. where 'r' denotes radius of that pen.

Now as per question, #pi*r^2 = 49*pi# [divide both sides by #pi#]

#rArr # r^2 = 49

#rArr r = sqrt49 = 7#

Hence radius = 7 yard. So diameter = 2*7 = 14 yards.

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