A person travelled from one place to another at an average speed of 40 kilometres/hour and back to the original plac

Question Asked by a Student from EXXAMM.com Team

Q 2451456324.     A person travelled from one place to another at an
average speed of 40 kilometres/hour and back to the
original place at an average speed of 50 kilometres/
hour. What is his average speed (in kilometres/hour)
during the entire round-trip?
IAS 1995 Prelims
A

45

B

20 sqrt 5

C

400//9

D

impossible to find out unless the distance behveen the two places is known

HINT

(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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