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Start learning 50% faster. Sign in nowIf B’s age be x years, then A’s age be (x - 3) years. According to question, => (x – 3)/x = 7/10 => 10x – 30 = 7x => x = 10 Therefore A's age = 10 – 3 = 7 years
Two trains approach each other at 21 kmph and 25 kmph from 2 places 230 km apart. After how many hours they will meet?
A train approaches a tunnel a PQ. Inside the tunnel a cat located at a point i.e., 7/16 of a distance PQ measured from the entrance P. When the train wh...
Train A running with a sped of 126 km/h crosses a vertical pole in 22 seconds. Speed of train A is 6 m/s less than speed of train B, and length of train...
A train 400 metres long is running at a speed of 54 km/hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is:
Car 'X' travels for 4 hours to reach from point A to B. Car 'Y' travels 210 km to reach from point B to C in 3 hours. Distance travelled by car 'X' to c...
Two trains started from stations ‘A’ and ‘B’ at same time and started travelling towards each other at speeds of 80 km/hr and 70 km/hr, respecti...
Two trains, A and B, cross each other in 15 seconds and 35 seconds respectively, when running in opposite and the same direction respectively. If the sp...
Train ‘A’ takes 12 seconds to cross a pole and 30 seconds to cross a 360 metre long bridge. If the length of the train had been 200 metres then find...
Train A running at speed of 99 km/hr crosses a platform having twice the length of train in 18 sec. Train B whose length is 390m crosses same platform i...
