Question

In 2 days 20 hours a watch gains 20 seconds find how much time the watch will take to gain 35 seconds ??

Answer 1

It should take the watch 119 hours or 4 hours and 23 hours. You can find this through proportions. 2 days and 20 hours are equal to 68 hours. So if the watch takes 68 hours to gain 20 seconds, then it takes about 3.4 hours to gain a second. Multiply 3.4 by 35 to find that it takes exactly 119 hours.

Answer 2

→ Chapter : Ratio ←
≡ We know that:
⇔ 2 days 20 hours = 68 hours → Gain 20 seconds
⇔ N → Gain 35 seconds

≡ Solution:
⇒ $\frac{68}{N}=\frac{20}{35}$
⇒ $N=\frac{(68).(35)}{20}$
⇒ $N=\boxed{119}Hours=\boxed{4}Days\boxed{23}Hours$