Question
Train 'A' is 250 meters long and it crosses a pole in
10 seconds. It also crosses Train 'B' moving in the opposite direction in 10 seconds. If Train 'B' is twice as long as Train 'A', find the distance covered by Train 'B' in 24 minutes.Solution
Speed of Train 'A' = 250 ÷ 10 = 25 m/s Length of Train 'B' = 2 × 250 = 500 meters Combined length of Train 'A' and 'B' = 250 + 500 = 750 meters Relative speed of Train 'B' w.r.t Train 'A' = 750 ÷ 10 = 75 m/s So, speed of Train 'B' = 75 − 25 = 50 m/s = 50 × (18/5) = 180 km/h Distance covered by Train 'B' in 24 minutes = 180 × (24/60) = 72 km
What should come in place of (?) question mark in the given number series.
81, 73, 66, 60, 55, ?
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...What should come in place of (?) question mark in the following number series.
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What will come in place of the question mark (?) in the following series?
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What value should come in the place of (?) in the following number series?
71, 72, 76, 103, ?, 244254, ?, 1022, 1150, 1214, 1246
