Question

I noticed that my watch goes $1/2$ minute fast at dusk, but at dawn it loses $1/3$ minute. On $1^{st}$ March morning my watch showed right time, then on which of the following dates the watch was $5$ minutes fast?

• A. $28$th March
• B. $29$th March
• C. $30$th March
• D. $31$st March

Answer 1

Answer: (D)

$31$st March

$\frac{1}{2}$ min fast and $\frac{1}{3}$ minutes slower.

So, overall it is $\frac{1}{6}$ minutes faster.

In 6 days, it is 1 min faster.

In 30 days it is 5 min faster.

So, it will be on 31st march that it is 5 min faster.

Hence, Option D is correct.