A train travels 2 1/2 hrs at 90 kmph to travel the same distance in 2 hours, how much speed required for the train?
A train travels 2 1/2 hrs at 90 kmph to travel the same distance in 2 hours, how much speed required for the train?
A) 112 1/2 km/hrs
B) 110 km/hrs
C) 141 1/2 km/hrs
D) None
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2 Answers
Correct option is (A) \(112\frac12\,km/hrs\)
Distance covered by train in \(2\frac12\) hrs = speed \(\times\) time
= 90 \(\times\) \(2\frac12\) km = 90 \(\times\) \(\frac52\) km
= 45 \(\times\) 5 km = 225 km
\(\therefore\) Speed required to covered same distance (225 km) in 2 hours \(=\frac{Distance}{Time}\)
\(=\frac{225}2\,km/hrs\) \(=112\frac{1}2\,km/hrs\)
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