Discussion :: Area

The area of playground is 1600 m^{2}. What is the perimeter?
I. It is a perfect square playground.
II. It costs Rs. 3200 to put a fence around the playground at the rate of Rs. 20 per metre.
A.
I alone sufficient while II alone not sufficient to answer 
B.
II alone sufficient while I alone not sufficient to answer 
C.
Either I or II alone sufficient to answer 
D.
Both I and II are not sufficient to answer 
E.
Both I and II are necessary to answer 
Answer : Option C
Explanation :
Area = 1600 m^{2}.
I. Side = 1600 m = 40 m. So, perimeter = (40 x 4) m = 160 m.
I alone gives the answer.
II. Perimeter =\(\frac {\text{Total cost} } {\text{cost per metre } }\)=\(\frac { 3200} { 20 } \)m =160 m
II alone gives the answer.
Correct answer is (C).
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