Question

A watch showed 5 minutes past 3 O'Clock on Sunday evening, when the correct time was 3 O'Clock. It loses uniformly and was observed to be 10 minutes slow on the subsequent Tuesday at 9 p.m. When did the watch show the correct time?

1. 8 a.m. Monday
2. 10 a.m. Monday
3. 7 a,m. Monday 
4. 9 a.m. Monday

Answer 1

Correct Answer - Option 4 : 9 a.m. Monday

Given,

A watch showed 5 minutes past 3 O'Clock on Sunday evening, when the correct time was 3 O'Clock. It loses uniformly and was observed to be 10 minutes slow on the subsequent Tuesday at 9 p.m.

Here we see clock lags by 1 minute per 3.6 hr.

54 / 15 = 3.6

∴ 3.6 × 5 = 18 hr

∴ The clock shows the correct time at 9 a.m. Monday.

Hence, the correct answer is 9 a.m. Monday.