Two automobiles are 150 kilometers apart and traveling toward each other. One automobile is moving at 60km/h and the other is moving at 40km/h mph. In how many hours will they meet?

A. 2.5
B. 2.0
C. 1.75
D. 1.5
E. 1.25

Submitted by: Mansoor Ul Haque

One moves at 60km/h, so in an hour, he’ll travel 60km
The other moves at 40km/h, so in an hour, he’ll travel 40km
This is towards each other, so, in an hour, we can say that they’ll get 60+40=100km closer.

This means that they get closer at 100km/h

Given that we have the distance of 150km, and the speed of closure at 100kmh, we can now use the equation

S=D/T

Rearrange to find T (times both sides by T)

S x T = D (now divide both sides by S)

T=D/S

Time = 150km divided by 100km/h

Time = 1.5 hours

Or one hour and 30 minutes

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17 Comments

Aamir on 05/09/2018 11:45 AM

Answer is 1.25hrs

Sonia shahid on 13/12/2018 6:03 PM

Assalam-o-Alaikum. I had apply for the post of Bureau of Statistics BPS-17. MCQS or any Special tips that might be help full for my test that’s is going to held on 6th January.

ayat on 05/01/2019 7:10 PM

answer will be 7.5 hour

zoni on 27/03/2019 12:57 AM

Can u plz give the solution of this question

- admin on 17/06/2019 11:32 PM
  
  Solution added now
  
noor nabi on 30/04/2019 11:48 PM

simple hai agar dono k km dekhe jay to 1 hour me dono 100 km cover kr rahe hain matlb remainig 50 km bach gay to agar 1 hour me 100 km agar kr rhe hain to to 50 km half an hour me honge means total hours 1.5 lage

Rab Nawaz on 16/06/2019 2:35 PM

Bro ye maths hai to yahan pe answers k sath solutiom b hona chahye jese smjh aa sake prove zaruri hai to lehaaza solution b diya hai data k sath. thanks

- admin on 17/06/2019 11:32 PM
  
  Solution added now
  
Shoaib abro on 23/09/2019 4:25 PM

Why eds portion contains arithmetic?

- admin on 23/09/2019 6:48 PM
  
  thanks for pointing it out. it has been moved to maths section
  
Akramullah khan on 08/02/2020 3:12 PM

Respected sir,
Sir physics ki koi mcqs book ka naam batayen

Iman on 11/04/2020 6:06 PM

Solution?

Zulqarnain saahi on 14/04/2020 9:35 AM

Suppose time = x hours
Both cars will have same time, but different distances depending upon speed.
So,

(60km/h).x + (40km/h).x = 150
(100 km/hour ).x =150
X= 1.5

Qaisar Abbas on 10/09/2020 12:34 PM

Dear I need past ppsc papers of lect physics
If you have plz share me
Will be thankful to you

Alam Zeb on 25/09/2020 6:29 PM

Simple is one is moving with 60km/hr means
150/60 = 2.5 hr
150/40 = 3.75 the difference between both is 3.75-2.5 = 1.25

Ahmed Ali Khuwaj on 29/10/2020 3:44 PM

Speed = Distance/time
t=d/s
T1=150/60 =2.5
T2=150/40= 3.75
Meeting time=T2-T1
=3.75-2.5
=1.25
Answer =1.25

Engr Asim on 17/02/2021 2:41 PM

As they are moving towards each other so their relative velocity will b added
60+40=100km/h
Time= distance/speed = 150/100 = 1.5 sec