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One-fourth of a certain journey is cover...

One-fourth of a certain journey is covered at the rate of 25 km/h, one-third at the rate of 30 km/h and the rest at 50 km/h. Find the average speed for the whole journey.

A

600/53 km/h

B

1200/53 km/h

C

1800/53 km/h

D

1600/53 km/h

Text Solution

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The correct Answer is:
C
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