Question

A clock takes three seconds to strike 3O'clock. How much time will it take to strike 6O'clock.

Answer is 7.5 seconds
plz give full solution fast only if u know

Answer 1

consider the clock has started from 1O' clock , then by unitary method :-

time taken to strike 3O'clock= 3 sec.
" " " " 1O' clock
( since TWO hrs have elapsed)= 3/2 i.e. 1.5 sec.

time it will take to strike 6O'clock
(since FIVE hrs have elapsed from 1 to 5)= 1.5×5 i.e. 7.5 sec.