You visited us 3 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Other

Quantitative Aptitude

Meeting Point

If two trains...

Question

If two trains are moving towards each other with velocities of 50 km/h and 60 km/h respectively. A fly flies to and fro in between them at a speed of 5 km/h. The initial distance between the trains is 220 km. How much distance will the fly cover before the trains crash?

5 km

No worries! We‘ve got your back. Try BYJU‘S free classes today!

10 km

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

15 km

No worries! We‘ve got your back. Try BYJU‘S free classes today!

20 km

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is D 10 km
Let us first calculate the time the trains take to crash.
$T i m e = \frac{d i s t a n c e}{r e l a t i v e s p e e d}$
$T i m e = \frac{220 k m}{110 k m / h} = 2 h$
The distance travelled by the fly is = $t i m e \times s p e e d = 2 h \times 5 k m / h = 10 k m$
Hence option B is correct.

Suggest Corrections

Similar questions

Q. Two trains A and B 60 km apart are approaching each other with speed 30 km/hr. A bird flies to and fro between A and B with a speed of 60 km/hr until they collide.

Find the distance covered and displacement of the bird?

Q. Two trains each having a speed of

30 kmph

are headed at each other on the same straight track. A bird that can fly at

60 kmph

flies off from one train when they are

60 km

apart and heads directly for the other train. On reaching the other train, it flies directly back to the first and so forth. How many trips can the bird make from one train to the other before the crash. Also find the total distance that the bird travels.

Q. Two trains A and B 60 km apart are approaching each other with speed 30 km/hr. A bird flies to and fro between A and B with a speed of 60 km/hr until they collide.

Find the distance covered and displacement of the bird?

Q. Two trains each having a speed of

30 km/h

are headed at each other on the same straight track. A bird that can fly at

60 km/h

flies off from one train when they are

60 km

apart and heads directly for the other train. On reaching the other train, it flies directly back to the first and so forth. How many trips

(n)

can the bird make from one train to the other before the trains crash. Find the total distance that the bird travels assuming bird to be a point object.

Two trains ,each having a speed of 30km/h,are headed at each other on same track.A bird flies off one train to another with a constant speed of 60km/h when they are 60km apart till before they crash.the distance covered by the bird

A.20km

B.40km

C.60km

D.30km

Join BYJU'S Learning Program

If two trains are moving towards each other with velocities of 50 km/h and 60 km/h respectively. A fly flies to and fro in between them at a speed of 5 km/h. The initial distance between the trains is 220 km. How much distance will the fly cover before the trains crash?

The correct option is D 10 kmLet us first calculate the time the trains take to crash. Time=distancerelative speedTime=220 km110 km/h=2 hThe distance travelled by the fly is = time×speed=2h×5km/h=10kmHence option B is correct.