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Two boys start running at the same time in the same direction at a speed of 10 km/hr and 12 km/hr respectively. In what time they will be 8 km apart?

Two boys start running at the same time in the same direction at a speed of 10 km/hr and 12 km/hr respectively. In what time they will be 8 km apart?
QuestionTwo boys start running at the same time in the same direction at a speed of 10 km/hr and 12 km/hr respectively. In what time they will be 8 km apart?
Typemultiple_choice
Option3 hoursincorrect
Option4 hourscorrect
Option5 hoursincorrect
Option6 hoursincorrect
Solution :

Both the boys are in motion so we will consider relative speed to find the time.

Relative speed = 12 – 10 = 2 km/hr

Distance = 8 km Time =82= 4 hours (Option B)

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