Question
Who invented the first mechanical
computer?Solution
Charles Babbage invented the first mechanical computer, known as the Analytical Engine.
- Train ‘X’ is 360 metres long and takes 18 seconds to cross a pole. Speed of train ‘Y’ is 22 m/sec. If both trains cross each other in 16 seconds wh...
Train A when travelling with a speed of 144 km/h crosses a pole in 6 seconds. Find the time taken by the train A to cross another train B of length 25% ...
Train A, moving at 90 km/h, crosses a pole in 8 seconds. Find the time it takes to cross another train of equal length, coming from the opposite directi...
Two trains running on parallel track with lengths 140 m and 40 m respectively. When travelling in opposite directions they are observed to pass each oth...
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Length of train 'X' is (35n - 30) metres, which is 200 metres more than that of train 'Y'. Time taken by 'X' and 'Y' to cross a pole is 20 seconds and 1...
Train ‘A’ running with a speed of 108 km/hr crosses a vertical pole in 13 seconds. Find the approx. time taken by the train ‘A’ ...
A 360 m long train crosses a platform twice its length in 2 min. Find the speed of the train.
A train takes to cross a man standing on a platform and a 360m long bridge 12 sec and 30 sec respectively. How long will it take to cross a 220m long pl...
A train of length 150 m passes a platform of length 350 m in 25 s.
Find: (i) speed of the train in km/h, (ii) time to pass a man standing still.
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