Quiz Discussion

A car travels the first one third of a certain distance with a speed of 10 km/hr, the next one third distance with a speed of 20 km/hr and the last one third distance with a speed of 60 km/hr. thee average speed of the car for the whole journey is :

Course Name: Quantitative Aptitude

  • 1] 18 km/hr
  • 2] 24 km/hr
  • 3] 30 km/hr
  • 4] 36 km/hr
Solution
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# Quiz
1
Discuss

Two planes move along a circle of circumference 1.2 kms with constant speeds. When they move in different directions, they meet every 15 seconds and when they move in the same direction one plane overtakes the other every 60 seconds. The speed of the slower plane is :

  • 1] 0.02 km/sec
  • 2] 0.03 km/sec
  • 3] 0.04 km/sec
  • 4] 0.05 km/sec
Solution
2
Discuss

A train travelling at 48 kmph crosses another train, having half of its length and travelling in opposite direction at 42 kmph, in 12 seconds. It also passes a railway platform in 45 seconds. The length of railway platform is:

  • 1] 200m
  • 2] 300m
  • 3] 350m
  • 4] 400m
Solution
3
Discuss

An aeroplane flies from place A to place B at the speed of 500 km/hr. On the return journey, its speed is 700 km/hr. The average speed of the aeroplane for the entire journey is ?

  • 1]

    \(566\frac{2}{3}{ \text{ km/hr}}\)

  • 2]

    \(583\frac{1}{3}{ \text{ km/hr}}\)

  • 3]

    \(583\frac{2}{3}{ \text{ km/hr}}\)

  • 4]

    \(600{ \text{ km/hr}}\)

Solution
4
Discuss

Two guns were fired from the same place at an interval of 8 minutes. A person approaching the place observes that 5 minutes 52 seconds have elapsed between the hearing of the sound of the two guns. If the velocity of the sound is 330 m/sec, the man was approaching the place at what speed (in km/hr) ?

  • 1] 24 km/hr
  • 2] 27 km/hr
  • 3] 30 km/hr
  • 4] 36 km/hr
Solution
5
Discuss

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
6
Discuss

Due to the technical snag in the signal system two trains start approaching each other on the same track from two different stations, 240 km away each other. When the train starts a bird also starts moving to and fro between the two trains at 60 kmph touching each train each time. The bird initially sitting on the top of the engine of one of the trains and it moves so till these trains collide. If these trains collide one and half hour after start, then how many kilometers bird travels till the time of collision of trains?

  • 1] 90 km
  • 2] 130 km
  • 3] 120 km
  • 4] 95 km
  • 5] None of these
Solution
7
Discuss

A car goes 20 metres in a second. Find its speed in km/hr.

  • 1] 20 km/hr
  • 2] 18 km/hr
  • 3] 72 km/hr
  • 4] 36 km/hr
Solution
8
Discuss

A girl while walking diametrically across a semicircular playground, takes 3 minutes less than if she had kept walking round the circular path from A to B. If she walks 60 metres a minute, what is diameter of the play ground?

  • 1] 60 m
  • 2] 48 m
  • 3] 84 m
  • 4] 315 m
  • 5] None of these
Solution
9
Discuss

Two cyclists start from the same place in opposite directions. One goes towards north at 18 kmph and the other goes towards south at 20 kmph. What time will they take to be 47.5 km apart ?

  • 1]

    \({ \text{1}}\frac{1}{4}{ \text{ hrs}}\)

  • 2]

    \({ \text{2}}\frac{1}{4}{ \text{ hrs}}\)

  • 3]

    2 hrs 23 min

  • 4]

    \({ \text{2}}\frac{1}{2}{ \text{ hrs}}\)

Solution
10
Discuss

A thief sees a jeep at a distance of 250 m, coming towards him at 36 km/h. Thief takes 5 seconds to realize that there is nothing but the police is approaching him by the jeep and start running away from police at 54 km/h. But police realise after 10 second, when the thief starts running away, that he is actually a thief and gives chase at 72 km/h. How long after thief saw police did catchup with him and what is the distance police had travel to do so?

  • 1] 50 s, 1000 m
  • 2] 65 s, 1150 m
  • 3] 65 s, 1300 m
  • 4] 45 s, 1050 m
  • 5] None of these
Solution
# Quiz