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harsh.champ
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- Location: India
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If the radius of a circle is increased by 20% then the area is increased by :
A. 44%
B. 120%
C. 144%
D. 40%
E. None of the above
The OA is A.
I used the following formula:-A = (pi)(r^2)
[spoiler]Hence,dA/dr = 2(pi)(r)
It seems shorter by using the derivative formula.[/spoiler]
A. 44%
B. 120%
C. 144%
D. 40%
E. None of the above
The OA is A.
I used the following formula:-A = (pi)(r^2)
[spoiler]Hence,dA/dr = 2(pi)(r)
It seems shorter by using the derivative formula.[/spoiler]
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Just because something is hard doesn't mean you shouldn't try,it means you should just try harder.
"Keep Walking" - Johnny Walker
