Question

4. Pankaj went to the post-office at the speed of 60 km/hr while
returning for his home he covered the half of the distance at
the speed of 10 km/hr, but suddenly he realized that he was
getting late so he increased the speed and reached the home by
covering rest half of the distance at the speed of 30 km/hr. The
average speed of the Pankaj in the whole length of journey is :
(a) 5.67 km/hr
(b) 24 km/hr
(C) 22.88 km/hr
(d) 5.45 km/hr​

Answer 1

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