Question

why it is possible to balance a metre rule at its midpoint but to balance a billiard cue at its midpoint​

Answer 1

Explanation:

Answer

Let the CP of one book be Rs. x. So,

CP of 16 books =Rs. 16x

According to the question,

SP of 12 books =Rs. 16x

Therefore,

SP of one book =Rs.1216x

=Rs.34x

Therefore,

Gain%= x(34x −x) ×100= 3xx

×100=3331 %