GATE 2016 EC (EC3) – Question 5

General Aptitude · Quantitative Aptitude: Data Interpretation, Arithmetic and Number Computation · 1 mark · Multiple choice

Two constant-speed trains take 10 s and 15 s respectively to pass a telegraph post completely. Their lengths are 120 m and 150 m respectively. The magnitude of their speed difference in m/s is

2.0
10.0
12.0
22.0

Practise this question in The GATE Grind →

Show answer and explanation

Correct answer: (A) 2.0

Explanation

To pass a fixed post, each train travels its own length. The first speed is 120/10=12 m/s and the second is 150/15=10 m/s.

Their speed difference is |12−10|=**2 m/s, A**. No relative-motion correction is needed because both times refer to the stationary post.

More Quantitative Aptitude: Data Interpretation, Arithmetic and Number Computation questions

GATE 2016 EC (EC3) Q6 – A vehicle’s velocity along a straight line, in m/s, is plotted against time in seconds.…
GATE 2016 EC (EC3) Q9 – Find the area bounded by 3x+2y=14 and 2x-3y=5 in the first quadrant.
GATE 2016 EC (EC3) Q10 – A straight line is fitted to ( x,y) data. It crosses the horizontal axis at x=0.1 and has…
GATE 2017 EE (EE2) Q4 – A twenty-question test totals 100 marks. Multiple-choice questions are worth 3 marks and…
GATE 2017 EE (EE2) Q5 – There are 3 red, 4 green and 3 blue socks. Two socks are chosen randomly. The probability…
GATE 2017 EE (EE2) Q8 – X is a 30-digit number beginning with digits 47. How many digits does X3 have?

All Quantitative Aptitude: Data Interpretation, Arithmetic and Number Computation questions →