Latest Syntel Aptitude Question SOLUTION: Travelling at 3/4th the speed a man is 20 minutes later then speed is??

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Travelling at 3/4th the speed a man is 20 minutes later then speed is??

Asked In Syntel (13 years ago)

Solved HARJINDER SINGH Read Solution (6)

Is this Puzzle helpful?   (17)   (11) Submit Your Solution Time Distance and Speed

Read Solution (6) :

HARJINDER SINGH  (11 years ago)

Let L be the distance, V be his usual speed.
We have L/(3/4 V) = L/V + 20.
So, 4/3 * L/V = L/V + 20,
Or 1/3 * L/V = 20,
we get L/V = 60 (min)

Is this solution Helpfull? Yes (31) | No (10)  

ashish  (11 years ago)

suppose L be the dist., V be his normal speed.now L/(3/4 V) = L/V + 20.
So, 4/3 * L/V = L/V + 20,
Or 1/3 * L/V = 20,
we get L/V = 60 (min)
but this is time for normal speed i.e.,t=60 and the other time t'=60+20=80 min.
now v-v'= 1-3/4 =1/4
so .. L/60-L/80=1/4 HENCE L=6 KM
SO, v = 6km/60 min or, 6km/h

Is this solution Helpfull? Yes (17) | No (2)  

pradeep  (11 years ago)

unless and until distance is mentioned speed can not be determined

Is this solution Helpfull? Yes (3) | No (10)  

pritam banerjee  (10 years ago)

d=s*t
now speed is 3/4 th of orginal means tym is 4/3 th of originl (coz s ~1/t) that means tym taken extra is 4/3 -1 =1/3 th of original and it is equal to 20 min so 1/3 * ori =20 => ori =60 min thnk u . this is the fastest process to solve this kind of sums

Is this solution Helpfull? Yes (3) | No (1)  

Rashmi Chouhary  (11 years ago)

v=d/t
1/4x=1/t=60/20
x=12 km/hr

Is this solution Helpfull? Yes (2) | No (13)  

santosh  (12 years ago)

wkt speed=1/t or t=1/s
Assume actual speed=x
1/x-4/3=20/60
x=(3/7)*60
x=25.71 km/m.

Is this solution Helpfull? Yes | No (25)  

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