Question

In 2 days and 20 hours, a watch gains 20 sec; find how much time will the watch take to gain 35 sec.?

Answer 1

In 2 days and 20 hours (which is 2 × 24 = 48 + 20 = 68 hours), the watch gains 20 seconds

We need to find out how much time the watch will take to gain 35 seconds.

Let's denote the time required to gain 35 seconds as 

We set up the proportions:

`68/20 = t/35`

= 68 × 35 = 20 × t

2380 = 20t

`t = 2380/20`

t = 119 hours

119 hours can be divided into days and hours:

119 ÷ 24

= 4 days and 23 hours

Therefore, the watch will take 4 days and 23 hours to gain 35 seconds.