You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Physics

Vector Addition

Two cars are ...

Question

Two cars are moving in the same direction with a speed of 30 $k m h^{- 1}$ . They are separated from each other by 5 km. Third car moving in the opposite direction meets the two cars after an interval of 4 minutes. What is the speed of the third car?

35 k m h^{- 1}

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

40 k m h^{- 1}

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

45 k m h^{- 1}

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

75 k m h^{- 1}

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

Open in App

Solution

The correct option is C $45 k m h^{- 1}$
Let the speed of third car be x km/hr
$t = 4 m i n = 1 / 15 h r$
$D = 5 k m$
Relative speed $= 30 + x = D / t = 75$
Thus $x = 75 - 30 = 45$ km/hr

Suggest Corrections

Similar questions

Q. Two cars are moving in the same direction with a speed of

30 {km h}^{- 1}

. They are separated from each other by

5 km

. Third car moving in the opposite direction meets the two cars after an interval of 4 minutes. What is the speed of the third car?

Q. Two cars are moving in the same direction with a speed of

30 kmph

. They are seperated from each other by

5 km

. Third car moving in the opposite direction meets the two cars after an interval of 4 minutes. What is the speed of the third car?

Two cars A and B are moving in same direction with a speed of 30km per hr. They are separated from each other by 5 km. Third car moving in the opposite direction meets the two cars after an interval of 4 mins. The speed of third car is ? ( use relative velocity to solve the problem)

1. 30km per hr

2. 25km per hr

3. 40km per hr

4. 45km per hr

Q. Two car are moving in the same direction with same speed of

30 k m p h

. They are separated by

5 k m

. What is the speed of car moving in the opposite direction if it meets the two cars at an interval of

4

minute:

Join BYJU'S Learning Program

Two cars are moving in the same direction with a speed of 30 kmh−1. They are separated from each other by 5 km. Third car moving in the opposite direction meets the two cars after an interval of 4 minutes. What is the speed of the third car?

The correct option is C 45kmh−1Let the speed of third car be x km/hrt=4min=1/15hrD=5kmRelative speed =30+x=D/t=75 Thus x=75−30=45 km/hr

Two cars are moving in the same direction with a speed of 30 $k m h^{- 1}$ . They are separated from each other by 5 km. Third car moving in the opposite direction meets the two cars after an interval of 4 minutes. What is the speed of the third car?

The correct option is C $45 k m h^{- 1}$
Let the speed of third car be x km/hr
$t = 4 m i n = 1 / 15 h r$
$D = 5 k m$
Relative speed $= 30 + x = D / t = 75$
Thus $x = 75 - 30 = 45$ km/hr