Quiz Discussion

A person can row a boat d km upstream and the same distance downstream in 5 hours 15 minutes. Also, he can row the boat 2d km upstream in 7 hours. How long will it take to row the same distance 2d km downstream?

Course Name: Java

  • 1]

    \(\frac{{3}}{{2}}\) hours

  • 2]

    7 hours

  • 3]

    \(\frac{{29}}{{4}}\) hours

  • 4]

    \(\frac{{7}}{{2}}\) hours

Solution
No Solution Present Yet

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Train A travelling at 60 km/hr leaves Mumbai for Delhi at 6 pm. Train B travelling at 90 km/hr also leaves Mumbai for Delhi at 9 pm. Train C leaves Delhi for Mumbai at 9 pm. If all the three trains meet at the same time between Mumbai and Delhi, then what is the speed of train C if the distance between Delhi and Mumbai is 1260 km ?

  • 1] 60 km/hr
  • 2] 90 km/hr
  • 3] 120 km/hr
  • 4] 135 km/hr
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Train A leaves Ludhiana for Delhi at 11 am, running at the speed of 60 km/hr. Train B leaves Ludhiana for Delhi by the same route at 2 pm on the same day, running at the speed of 72 km/hr. At what time will the two trains meet each other ?

  • 1] 2 am on the next day
  • 2] 5 am on the next day
  • 3] 5 pm on the next day
  • 4] None of these
Solution
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A train 300 m long passed a man walking along the line in the same direction at the rate of 3 km/hr in 33 sec. The speed of the train is :

  • 1]

    30 km/hr

  • 2]

    32 km/hr

  • 3]

    \(32\frac{8}{{11}}\)  km/hr

  • 4]

    \(35\frac{8}{{11}}\)  km/hr

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A man walk a certain distance and rides back in 4 hours 30 minutes. He could ride both ways in 3 hours. The time required by the man to walk both ways is :

  • 1] 4 hours 30 minutes
  • 2] 4 hours 45 minutes
  • 3] 5 hours
  • 4] 6 hours
Solution
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A starts 3 Minutes after B for a place 4.5 km distant. B, on reaching his destination, immediately returns and after walking a km meets A. If A can walk 1 Km in 18 minutes,then what is B's speed?

  • 1] 4 km/h
  • 2] 6 km/h
  • 3] 7 km/h
  • 4] 5 km/h
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A plane flying north at 500 mph passes over a city at 12 noon. A plane flying east at the same altitude passes over the same city at 12.30 pm. The plane is flying east at 400 mph. To the nearest hundred miles, how far apart are the two planes at 2 pm ?

  • 1] 600 miles
  • 2] 1000 miles
  • 3] 1100 miles
  • 4] 1200 miles
  • 5] 1300 miles
Solution
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A boat covers 48 km upstream and 72 km downstream in 12 hours, while it covers 72 km upstream and 48 km downstream in 13 hours The speed of stream is :

  • 1] 2 kmph
  • 2] 2.2 kmph
  • 3] 2.5 kmph
  • 4] 4 kmph
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A square playground measure 1127.6164 sq.m. If a man walks \(2\frac{9}{{20}}\) m a minute, the time taken by him to walk one round around it is approximately :

 

  • 1] 50.82 minutes
  • 2] 54.82 minutes
  • 3] 54.62 minutes
  • 4] 50.62 minutes
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A train can travel 50% faster than a car. Both start from point A at the same time and reach point B 75 kms away from A at the same time. On the way, however, the train lost about 12.5 minutes while stopping at the stations. The speed of the car is :

  • 1] 100 kmph
  • 2] 110 kmph
  • 3] 120 kmph
  • 4] 130 kmph
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A train covers a distance between two stations A and B in 45 minutes. If the speed of the train is reduced by 5 km/hr, then it covers the distance in 48 minutes. The distance between the stations A and B is :

  • 1] 55 km
  • 2] 60 km
  • 3] 64 km
  • 4] 80 km
Solution
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