A clock strikes 4 taking 9 seconds. In order to strike 12 at the same rate, the time taken is?
33 seconds
30 seconds
36 seconds
27 seconds
Explanation:
There are 3 intervals when the clock strikes 4
Time taken for 3 intervals = 9 seconds
Time taken for 1 interval =$\dfrac{9}{3}$=3 seconds
In order to strike 12, there are 11 intervals.
Hence time needed =3 $\times$ 11 = 33 seconds