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A person travels equal distances with speed of 3 km/hr, 4 km/hr and 5 km/hr and takes a total of 47 minutes. Find the total distane

  • 3 km
  • 4 km
  • 6 km
  • 9 km

Answer: Option A

Explanation:

Let the distance be 3x km,
then,
x3+x4+x5=476047x60=4760x=1


So total distance = 3*1 = 3 Km

Similar Questions :

1. An athlete runs 200 meters in 24 seconds. His speed is ?

  • 10 km/hr
  • 17 k/hr
  • 27 km/hr
  • 30 km/hr

Answer: Option D

Explanation:

Speed=DistanceTime=20024m/sec=253m/sec253∗185km/hr=30km/hr

2. A cyclist covers a distance of 750 meter in 2 minutes 30 seconds. What is the speed in km/hr of cyclist

  • 16 km/hr
  • 17 km/hr
  • 18 km/hr
  • 19 km/hr

Answer: Option C

Explanation:

Speed=DistanceTimeDistance=750meterTime=2 min 30 sec=150secSpeed=750150=5m/sec=>5∗185km/hr=18km/hr

3. A thief is noticed by a policeman from a distance of 200 m. The thief starts running and the policeman chases him. The thief and the policeman run at the rate of 10 km and 11 km per hour respectively. What is the distance between them after 6 minutes ?

  • 50 meter
  • 100 meter
  • 110 meter
  • None of above

Answer: Option B

Explanation:

Relative speed of the thief and policeman = (11 – 10) km/hr = 1 km/hr

Distance covered in 6 minutes =
160∗6=110=100meters



So distance between them after 6 minutes = 200 - 100
= 100 meters

4. A walks around a circular field at the rate of one round per hour while B runs around it at the rate of six rounds per hour. They start at same point at 7:30 am. They shall first cross each other at ?

  • 7:15 am
  • 7:30 am
  • 7: 42 am
  • 7:50 am

Answer: Option C

Explanation:

Relative speed between two = 6-1 = 5 round per hour

They will cross when one round will complete with relative speed,
which is 1/5 hour = 12 mins.

So 7:30 + 12 mins = 7:42

5. Two boys starting from the same place walk at a rate of 5kmph and 5.5kmph respectively. What time will they take to be 8.5km apart, if they walk in the same direction?

  • 15 hours
  • 16 hours
  • 17 hours
  • 18 hours

Answer: Option C

Explanation:

In this type of questions we need to get the relative speed between them,
The relative speed of the boys = 5.5kmph – 5kmph
= 0.5 kmph

Distance between them is 8.5 km
Time = Distance/Speed
Time= 8.5km / 0.5 kmph = 17 hrs

Read more from - Time and Distance Questions Answers
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