(e) None of the above
14. A man completes 30 km of a journey at
6 km/h and the remaining 40 km of the
journey in 6 h. Find the average speed
for the whole journey. ISSC CGL 2007
(a) 6.- km/h (D) 7 km/h
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Answer:
30 km is covered by. the speed of 6km/h
then time taken = distance /speed= 30/6=5 hour
40 km is covered in 6 hour
average speed = total distance travelled/total time taken
= 30 + 40 / 5+6
= 70/11
__
=6.36 km /h
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