Two men AA and BB start from a place PP walking at 3 km and 3.5 km an hour respectively. How many kilometers will they be apart at the end of 3 hours, if they walk in opposite directions?

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13.5km

15.5km

17.5km

19.5km

answer is D.

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Detailed Solution

starting point of both men = p
distance covered by men A in one hour = 3 km
distance covered by men A in 3 hours = 3×3 = 9km
similarly,
distance covered by men B in one hour = 3.5km
distance covered by men B in 3 hours = 3.5×3 =10.5km
as men A and men B both covered their distance in opposite directions so we will add their distances to find out the distance between them.
distance between men A and men B = 9+10.5 = 19.5km.
So, Option 4 is correct.

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