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03 May 2018, 23:49
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C
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Difficulty:
15%
(low)
Question Stats:
78% (01:28) correct
22%
(01:16)
wrong
based on 176
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Gurjit started running from his home at exactly 6 am in the morning, ran up to a certain pole, and immediately ran back till he reached home; he never stopped once during this entire journey. Did Gurjit manage to reach back home latest by 6:50 am?
(1) Gurjit reached the pole at exactly 6:20 am.
(2) Gurjit's average speed while running back home from pole, was 20% lesser than his average speed while running towards the pole.
(1) Gurjit reached the pole at exactly 6:20 am.
(2) Gurjit's average speed while running back home from pole, was 20% lesser than his average speed while running towards the pole.
05 May 2018, 04:26
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amanvermagmat
From 1, we cannot determine whether while reaching back home, Gurjit took the same amount of time, higher or lesser
From 2, we know that while returning Gurjit took less 20% lesser than his average speed while running towards pole. again this in insufficient to deduce how much time did he took to reach at the pole.
Combining 1 and 2, we know gurjit took 20 minutes to reach at the pole and while returning his average speed was 20% lesser. Hence by simple computation
Lesser speed = More Time. 20% of 20 minute ~ 24 minutes. He might have taken more time to return speed is 20% lesser.
Hence the correct answer is C.
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+1 for kudos please
20 May 2018, 23:05
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(1) Gurjit reached the pole at exactly 6:20 am.
Not sufficient.dont know speed of going and returning
(2) Gurjit's average speed while running back home from pole, was 20% lesser than his average speed while running towards the pole.
Not sufficient.dont know distance or timing of reaching.
Combining both 1) and 2)
We have time of reaching.
From second, we have speed reduce by 20% , distance same so time increase by 20 percent
New time=6t/5(t=20)
=24 min
Total time= 44 min I.e 6.44 am
Sufficient
C is answer
Give kudos if it helps
Posted from my mobile device
Not sufficient.dont know speed of going and returning
(2) Gurjit's average speed while running back home from pole, was 20% lesser than his average speed while running towards the pole.
Not sufficient.dont know distance or timing of reaching.
Combining both 1) and 2)
We have time of reaching.
From second, we have speed reduce by 20% , distance same so time increase by 20 percent
New time=6t/5(t=20)
=24 min
Total time= 44 min I.e 6.44 am
Sufficient
C is answer
Give kudos if it helps
Posted from my mobile device
