A train passes an electric pole in 12 seconds and a bridge of length 240 meters in 24 seconds. Find the length of the train. MCQ with Answer and Explanation
A train passes an electric pole in 12 seconds and a bridge of length 240 meters in 24 seconds. Find the length of the train.
A. 200 meters
B. 240 meters
C. 180 meters
D. 300 meters
Answer: Option B
Solution (By JKSSB Mock Tests)
The train takes 12 seconds to cross its own length and 24 seconds to cross its own length plus the bridge. Therefore, it takes 24 - 12 = 12 seconds to cross the 240-meter bridge. Speed = 240 / 12 = 20 m/s. Length of train = Speed * Time to cross pole = 20 * 12 = 240 meters.
A car covers a distance of 360 km at a uniform speed. If the speed had been 15 km/h more, it would have taken 2 hours less for the journey. Find the original speed of the car.
A man walks at a speed of 6 km/h instead of 5 km/h and thereby covers 12 km more in the same duration. Find the actual distance covered by him at his normal speed.
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