RRB Group D 22-Sep-2018 Shift 1 Solved Paper

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Question : 7 of 100

Marks: +1, -0

Driving @

48 \ { km} \/ {hr}

Barun reached the destination 2 minutes ahead of time. If he drove @

42 \ { km} \/ {hr}

he would have been 1 minute late. What is the distance that Barun drove?

17.6 km
17.2 km
16.4 km
16.8 km

Solution:

Let the distance is

D

.

t_{2}-t_{1}=3

minutes

t_{2}-t_{1}={30}/{60} \ {hrs}

\ {D}/{42}-{D}/{48}={3}/{60}

{6 D}/{42 \×48}={3}/{60}

6 D={3 \×42 \×48}/{60}

D=16.8 \ { km}

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