Total height of 30 students of the class = 100 × 30 = 3000 cm When 6 new students joined the class, average height of each student = 100 + 3 =103 cm Total height of 36 students of the class = 103 × 36 = 3708 cm Average height of 6 new students who joined the class = {(3708 – 3000)/6} = 708/6 = 118 cm
Train P takes 27 seconds to cross a tree, and Train Q overtakes Train P, both traveling in the same direction, in 3 minutes. The ...
Two cars start from a place with a speed of 55 km/hr at an interval of 15 minutes. What is the speed of a man coming from the opposite direction towards...
A train takes 16 seconds to pass a stationary boy. The same train requires 38 seconds to traverse a platform measuring 495 meters in length. Determine t...
Time is taken by two trains running in opposite directions to cross a man standing on the platform in 30 seconds and 22 seconds respectively. It took 25...
A train started from station P and preceded towards station Q at a speed of 60 km/h. 35 minutes later, another train started from station Q and preceded...
Two trains, A and B, cross each other in 20 seconds and 30 seconds respectively, when running in opposite and the same direction respectively. If the sp...
Train A running at speed of 162 km/hr crosses a platform having twice the length of train in 22 sec. Train B whose length is 760m crosses same platform ...
A train passes an electrical pole in 15 seconds and passes a platform 480 m long in 60 seconds. Find the length of the train.
100 metre long train ‘A’ can cross a platform of length 50 metres in 20 seconds. If the speed of train ‘B’ is 6 m/s more than that of train ‘A...
Two trains, whose respective lengths are 120 metres and 180 metres, cross each other in 15 seconds when they are moving in opposite directions and in 5...
