Question

How much dies a watch gain or lose per day if its hands coincide every 66 minutes?

• A. 11 min 52 sec
• B. 11 min 54 sec
• C. 11 min 53 sec
• D. 11 min 55 sec

Answer 1

The correct option is B 11 min 54 sec

In every correct watch the two hands coincide at interval of 6551165511 min
As in the given watch two hands coincide at interval of 66 min so this watch loses
66−65511=61166−65511=611 min
Now 6624×60=611?6624×60=611?
∴∴ ?=11 min 54 sec.