A ship sails out to a mark at the speed of 15 km/h and sails

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A ship sails out to a mark at the speed of 15 km/h and sails back to the starting point at the speed of 10 km/h. The average speed of sailing of the ship is:

[SSC CHSL 8th June 2022 Shift-3 With Answers]

A

12 km/h

B

15 km/h

C

13 km/h

D

14 km/h

EXPLANATION

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