A ship sails out to a mark at the rate of 10 km per hour and sails back at the rate of 15 km per hour. What is its average rate of sailing? Options: A . &nbsp10 Km. per hr. B . &nbsp11 Km. per hr. C . &nbsp12 Km. per hr. D . &nbsp13 Km. per hr.

A ship sails out to a mark at the rate of 10 km per hour and sails back at th

Question

A ship sails out to a mark at the rate of 10 km per hour and sails back at the rate of 15 km per hour. What is its average rate of sailing?

Options:

A . 10 Km. per hr.

B . 11 Km. per hr.

C . 12 Km. per hr.

D . 13 Km. per hr.

Answer: Option C

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