Question

A thief robs a house at 12 midnight and, as soon as, he leaves the house, the house owner realizes of the robbery in the house. After 10 minutes, he rings the alert alarm, and the security guards of the house start running after the thief to catch him. If the speed of the thief is 30 km/hr and that of the security guards is 20 km/hr, what time will the guards take to catch the thief?

• A. 00.30 hrs
• B. 00.40 hrs
• C. 00.50 hrs
• D. Never catch the thief

Answer 1

The correct option is D Never catch the thief

The thief started running at $12$ midnight at speed $30$ km /hr
The security guards start running at $12:10$ am at the speed $20$ km /hr
As the security guards started late, they should have speed more than the thief's speed. But as their speed is slower, they guards can never catch the thief as they will always be behind him.