Two trains of length 180 m and 220 m are running in opposite directions, the first one at the rate of 50 kmph and while second one at . Calculate the time they will require to pass each other. A. 20 seconds b. 16 seconds c. 18 seconds d. 17 seconds
Answers
Answer:
A------>_40km/hr____________________50 km/hr_ <-------B
Speed of the first Train Let A is 40 Km/hr and Second Train B is 50 km/hr.
They run opposite to each other, then,
Relative or Effective Speed of the Trains Become,= 40 + 50 = 90 km/hr = 90 x 5/18 =25 m/sec
Length of The first train is 180m and second train is 220 m.
To cross each Other, They need to cross their own length i.e.
(180 +220 = 400)m with effective speed 25 m/sec.
<______180m________><_____120m_____>
So they will cover 400 m with speed 25 m/sec in = 400/25=16 secs.
A------>_40km/hr____________________50 km/hr_ <-------B
Speed of the first Train Let A is 40 Km/hr and Second Train B is 50 km/hr.
They run opposite to each other, then,
Relative or Effective Speed of the Trains Become,= 40 + 50 = 90 km/hr = 90 x 5/18 =25 m/sec
Length of The first train is 180m and second train is 220 m.
To cross each Other, They need to cross their own length i.e.
(180 +220 = 400)m with effective speed 25 m/sec.
<______180m________><_____120m_____>
So they will cover 400 m with speed 25 m/sec in = 400/25=16 secs.