Most Important Questions with Short Tricks on Time, Speed and Distance For SSC

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Dear Friends, 

Important Questions with Short Tricks focusing on Maths section related to the exam. To make the chapter easy for you all, we are providing you all some Short Tricks to solve the questions in Quant SectionWe hope you will like it. Feel free to share your feedback with us in the comment section.

Most Important Questions with Short Tricks on Time, Speed and Distance For SSC Exams 

Question 1: A train running at 25 km/hr takes 18 seconds to pass a platform. Next, it takes 12 seconds to pass a man walking at 5 km/hr in the opposite direction. Find the sum of the length of the train and that of the platform.

(1)  125 m

(2)  135 m

(3)  145 m

(4)  155 m

Solution: 

Speed of train = 25 km./hr.

image001

Distance travelled in 18 secs at this speed

Where D = L . train + L . platform

image002

length of train + length of platform = 125 m.

Short Trick:

Speed in m/sec. image004

image005

image006

Sum of length of train & Platformimage007

Question 2: Two trains for Delhi leave Jaipur at 8.30 a.m. and 9.00 a.m. and travel at 60 km/hr and 75 km/hr respectively. How many km. away from Delhi will the two trains meet.

(1)  125 km

(2) 150 km

(3)  175 km

(4)  200 km

Solution:

Distance covered by 1st train in 30 min. = 30 kms. (as speed per hrs. 60)

Time taken by 2nd train to cover 30 kms. = 2 hrs. (as it travels 15 km. per hr. more than 1st train. Hence takes 2 hrs. to cover 30 km. that 1st train has already covered)

Dist. covered = (60 x 2.5 hr.) or (75 x 2 hrs.) = 150 km.

Short Trick:

Required distance = (9.00 – 8.30) ximage008

Question 3: Two places P and Q are 162 km apart. A train leaves P for Q and at the same time another train leaves Q for P. Both the trains meet 6 hrs after they start moving. If the train travelling from P to Q travels 8 km/hr faster than the other train, find the speed of the two trains.

(1)  17.5 km/hr, 9.5 km/hr

(2)  19.5 km/hr, 11.5 km/hr

(3)  21.5 km/hr, 13.5 km/hr

(4)  Can’t be determined

Solution:

Suppose the speeds of the two trains are p km/hr and q km/hr respectively. Thus

and  p – q = 8 …… (ii)

(i) + (ii) implies that

image009

2p = 35     p = 17.5 km/hr

and (i) – (ii) implies that

2q = 19      q = 9.5 km/hr

Short Trick:

Take speed =image009

(x) + (x + 8) = 27 (as given diff. in speed = 8 kms./hr.)

9.5 & 17.5

Question 4: A train running at a speed of 60 kmph crosses a platform double its length in 32.4 seconds. What is the length of the platform?

(1)  180 metres

(2)  240 metres

(3)  360 metres

(4)  90 metres

Solution:

Let the length of the train be x m

length of the platform = 2x m

Total distance covered by the train = (2x + x =) 3x m

Now, according to the question

image006

or,    image012

Short Trick:

Speed in m/secimage013

image014

Distance coveredimage015

Total length

540

image017(as the length of platform is double of the train)

Question 5: A train travels at the speed of 65 kms/hr and halts at 8 junctions for a certain time. It covers a distance of 1300 kms in 1 day (24 hours). How long does the train stop at each junction, if it halts for the same period of time at all the junctions?

(1)  30 minutes

(2)  20 minutes

(3)  60 minutes

(4)  40 minutes

Solution: 

Speed = 65 kmph

Distance = 1300 kms

Time takenimage018

Clearly, 4 hours are spent at 8 junctions in stoppages as one full day was taken for the journey to be completed.

Required time = 4 x 60 = 240 min. and at each junction the halt is of image019

Short Trick:                                                                                        

Time to cover 1300 km=D/S = 1300/65= 20 hrs

Break = 24 hrs. – 20 hrs. = 4 hrs.

Break at each junction  image021= 30 min

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