Question

in 2 days and 20 hours a watch gains 20 seconds find how much time the watch take to gain 35 seconds

Answer 1

So  2 days + 20 hrs = 68 hrs are required to gain 20 seconds

To gain 1 second, 68/20 hrs are required

So for 35 seconds, 68/20 * 35 = 119 hrs = 4 days 23 hrs are required

After reaching 20 seconds gain more 2 days 3 hrs are required to gain 35 seconds

Answer 2

2 days 20 hrs = 68hrs
Seconds gained in 68 hrs = 20 sec
Time taken to gain 1sec = 68/20
Time taken to gain 35sec = 68/20 * 35 = 119 hrs = 4 days 23 hrs
Answer = 4 days 23 hrs