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Methods to Solve Questions on Time and Distance Part 4
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This lesson will allow one to learn tricks to solve questions based on time and distance. As this lesson begins Dhiraj takes you through few more variety of questions and solves each of them swiftly and easily.

Dhiraj Singh Chauhan
Income-tax Inspector, Cleared Assistant Commandant(SSB), From Saharanpur

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You deliberately say after reading the que " ye bahut aasan hai" n really u prove it while giving solution of dat. Sach kahu toh wo utne aasan hote nhi hain, jitna aap bana dete hain... This is just a little suggestion to all aspirants , please watch videos 2 or 3 times to become expert in concepts. Thankyou dhiraj n thankyou unacademy.
@Dheeraj Sir Plzz iska rply toh denaa. IN QUESTION NO. 14 I think its wrong cz ratio of time of Man : Shots (1:25) and speed ratio is reversed so Man : Shot (25:1) , Now speed of sound is given so according to this 1 ratio = 330 m/s .....but sir took 25R=330 m/s dont know why.....totally confused plzz help.
change the diagram, ratio of time will be sound:man -> 1/2:25/2 = 1:25 so speed ratio will be (s:m) 25:1
It makes sense because , If you consider time obviously sound will take less time than man. so 1:25 For speed, obviously sound will have more speed than man so 25:1
NARAYAN SHARMA
2 years ago
Dear vijay sir just think about speed. can a man have speed of 330m/s.just joking, but here 25 represents the time of man and in inverse ratio it represents the speed of sound.
Ashutosh Kumar
2 years ago
i agree with u vijay..assumption is other thing but according to format..i also confused.
sir, one doubt 1)The distance between two places A and B is 60 km. Two cars start at the same time from A and B, travelling at a speed of 35km/h and 25km/h, respectively. If the cars run in the same direction, then they will meet after ( in hours)
Ravindra Reddy
3 years ago
They will never meet :P your question is wrong ...If A and B start from the same point and at same time then there is no point of meeting time between them
Kush ak
3 years ago
Total distance covered by train B in an hour = 60+25=85 Relative speed = 35-25=10 Total time required to reach train B by the train A=85/10= 8hours and 30 minutes :)
NAZREEN anjum
3 years ago
6 hrs
Ajay Gond
3 years ago
Ans. 6hrs... see question no. 5 of this series
6hr, if running in opposite direction then 1hr.
Sayan Kuilya
a year ago
I sure that this question is wrong.. please review this question before solution...
Keshav Kumar
3 months ago
6 hrs read ques carefully before saying it is wrong
@Dhiraj Singh Chauhan sir iska reply please karna!!!!!! I think its wrong cz ratio of time of Man : Shots (1:25) and speed ratio is reversed so Man : Shot (25:1) , Now speed of sound is given so according to this 1 ratio = 330 m/s .....but sir took 25R=330 m/s dont know why.....totally confused plzz help.
please post some lessons on percentage.... your lectures are all awesome... its help a lot to the aspirants....
1. Tricks to Solve questions on Time and Distance PRESENTED BY DHIRAJ SINGH CHAUHAN

2. About me B.Sc.(Hons.) from BHU Varanasi 24th rank in CGL-2015(tier 1+tier2) Score: tier 1-150 tier 2-347.25 total-497.25 out of 600 Course fee: CONTRIBUTE Follow me on Unacademy at: https://unacademy.in/user/dhirajarya1

3. Question 12 A train goes from Delhi to goa at 50 kmph and returns at 40 kmph. Find his average speed during whole journey

4. D to Gr S h 2 00 Knm Total Dist.

5. Question 13 A monkey climbs on 57 meter high greased pole. In first minute, it climbs 10 meters and slips 2 meters in second. In what time will it reach that height.

6. e S4 Set 2 min SY A

7. Question 14 2 guns were fired at an interval of 13 minutes. A man who was approaching towards that lce heard the sound of second gun approaching towards that place heard the sound of second gun after 12/2 minutes of first fire. Find speed of man if speed of after 12172 minutes of first fire. Find speed of man if speed of sound is 330 m/s.

8. Man Soun Speed = 25:1