Q: A wire of length 6 m is stretched such that its radius is reduced by 20%. Which one of the following is the value of increase in its length?
(a)50%
(b)56.25%
(c)62.25%
(d)75%
Correct Answer: (b)
The correct answer is (a) '50%'. This question from the General Studies domain tests knowledge of Miscellaneous.