A train covers 180 km distance in 4 hours Another train covers the same distance in 1 hour less What...........

Quantitative Aptitude ( CCS) Time & distance

A train covers 180 km distance in 4 hours. Another train covers the same distance in 1 hour less. What is the difference in the distance covered by these trains in one hour?

45 km

9 km

40 km

None of these

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Explanation:

TRAIN 1 COVERS 180 KM IN 4 HOURS
TRAIN 2 COVERS 180 KM IN 3 HOURS
Then, the speed of the 1st train is = $\frac{180}{4}$ = 45km/h

Then, the speed of the 2nd train is = $\frac{180}{3}$ = 60km/h

THEREFORE, THE TRAIN 1st COVERS 45 KM IN 1 HOUR...
AND THE TRAIN 2nd COVERS 60 KM IN 1 HOUR...

THEREFORE THE DIFFERENCE BETWEEN THE DISTANCE OF THEM IS :-

DISTANCE COVERED BY 2ND TRAIN IS SUBSTRACTED BY THE DISTANCE COVERD BY 1ST TRAIN...
= (60 - 45) KM = 15 KM

Therefore the difference of the distance covered by these trains in 1 hour is 15 KM..

Hence, option 4 is the correct answer.

By: Amit Kumar

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A train covers 180 km distance in 4 hours Another train covers the same distance in 1 hour less What...........

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