In travelling form City A to B, a person drove 2 hours at 70 kmph; next 2 hours at 50 kmph and last 5 hours at 45 kmph. What is his average speed for the whole trip.

In travelling form City A to B, a person drove 2 hours at 70 kmph; nex

1.	In travelling form City A to B, a person drove 2 hours at 70 kmph; next 2 hours at 50 kmph and last 5 hours at 45 kmph. What is his average speed for the whole trip.
A.	51.66 kmph
B.	55.66 kmph
C.	51 kmph
D.	55 kmph
Answer» B. 55.66 kmph

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In travelling form City A to B, a person drove 2 hours at 70 kmph; next 2 hours at 50 kmph and last 5 hours at 45 kmph. What is his average speed for the whole trip.

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