Mathematics · Speed, Time and Distance
A train crosses a [2P + 40] m long bridge in 28 seconds and the same train crosses a [P + 60] m long bridge in 24 seconds. If the speed of the train is 20 m/s and the time taken by the train to cross a pole is t seconds, which of the following is true regarding the value of t?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1t is a perfect square number✓
- 2The sum of the digits of t is a perfect square number
- 3t is an odd number
- 4The sum of the digits of t is an even number
Correct answer
t is a perfect square number
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