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. 240 meters
B. 300 meters
C. 180 meters
D. 200 meters
Answer: Option A
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 sedan covers a distance path of 480 km at a uniform tracking speed. If the speed index is lowered by 10 km/h, the trip records 2 hours longer. Find the original baseline speed.
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