36
A man walks 6 km at a speed of 1 1/2 kmph, runs 8 km at a speed of 2 kmph and goes by bus another 32 km. Speed of the bus is 8 kmph. Find the average speed of the man.
- A4 (5/6) kmph
- B3 (5/6) kmph
- C5 (7/6) kmph
- DNone of these
Correct answer: B
Log in or create a free account to reply and vote.
0
CCommunity
3 (5/6) kmph
NA
NA
0
CCommunity
Solution:
A man walks 6km at a speed of 1.5 kmph ,
runs 8km at a speed of 2 kmph,
goes by bus for 32km at a speed of 8kmph.
Time taken for the individual cases,
1). T1 = 6/1.5 = 4h
2). T2 = 8/2 = 4h
3). T3 = 32/8 = 4h
Total time taken = 4 + 4 + 4 = 12 h
Total distance = 6 + 8 + 32 = 46 km
So, Average Speed = Total distance/Total time taken
= 46 / 12
= 23 / 6
= 3 (5/6) kmph
So, the correct option is B). 3 (5/6) kmph
A man walks 6km at a speed of 1.5 kmph ,
runs 8km at a speed of 2 kmph,
goes by bus for 32km at a speed of 8kmph.
Time taken for the individual cases,
1). T1 = 6/1.5 = 4h
2). T2 = 8/2 = 4h
3). T3 = 32/8 = 4h
Total time taken = 4 + 4 + 4 = 12 h
Total distance = 6 + 8 + 32 = 46 km
So, Average Speed = Total distance/Total time taken
= 46 / 12
= 23 / 6
= 3 (5/6) kmph
So, the correct option is B). 3 (5/6) kmph