Two boys start running from the same place in opposite directions. One goes toward east at 18 km per hour and other goes towards west at 20 km per hour. What time do they take to be 76 km apart?

Options
- 2 hrs
- 4 hrs
- 6 hrs
- 2.5 hrs

CORRECT ANSWER : 2 hrs

Discussion Board
It's easy

Time=Distnance/Speed
= 76/(18+20)
=76/38
=2 hr.
Since, speeds get added if they are in opposite direction.

Aravind 05-25-2019 12:39 AM

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