Question

Rajeev and Sanjeev are two close friends. Rajeev's watch gains $1$ minute in an hour and Sanjeev's watch loses $2$ minutes in an hour. Once they set both the watches at $12:00$ noon, with my correct watch. When will the two incorrect watches of Rajeev and Sanjeev show the same time together ?

• A. $8$ days later
• B. $10$ days later
• C. $6$ days later
• D. $4$ days later

Answer 1

The correct option is B $10$ days later

To show the same time together the difference between two watches must be $12$ h.

Now, since they create $3$ min difference in $1$ h.

So, they will create $12$ h difference in $\frac{1}{3}\times \frac{12\times 60}{24}=10$ days later.