Question

A wrist loses of 10 sec in every 8 hours. in how much time will it lose 15 sec

Answer 1

It is given that
Time taken by a wrist watch to lose 10 sec = 8 hours.

so that time taken by wrist watch to lose sec = 8/10 hours.

similarly the time taken by a wrist watch to a lose 15 sec = $\frac{8}{10}\times 15=12$ hours