Sound waves are longitudinal, meaning the vibrations move parallel to the direction of the wave. Their speed varies depending on the medium (fastest in solids, slowest in gases). Sound is produced by vibrating objects, transmitting energy through a medium.
Two cars X and Y start from two places A and B respectively which are 800 km apart at 8 a.m. Both the cars run at an average speed of 50 km/hr towards e...
Two cars X and Y start from two places A and B respectively which are 700 km apart at 9 a.m. Both the cars run at an average speed of 60 km/hr towards e...
A bike completes a journey in 4hrs with a speed of 60 km/hr. At what speed must it travel to complete the journey in 6 hrs?
A man walks 4 km at a speed of 2 kmph, runs 6 km at a speed of 2 kmph and goes by bus another 32 km. Speed of the bus is 8 kmph. Find the average speed ...
Ratio of speeds of ‘A’ and ‘B’ is 6:11, respectively. If they participate in a 220-metre race and ‘B’ gives ‘A’, a head start of ‘m’...
A driver of an army truck sees an ambulance 80 meters ahead of him. After 10 seconds the ambulance is 70m behind. If the speed of the truck is 104kmph, ...
An Aeroplane flies along a Square field @ 50, 100, 200 and 400 km/hours respectively. Then find the Average speed of the aeroplane during the whole jour...
A boat goes downstream for 44 km and immediately return. It took the boat twice as long as to make the return trip. If the speed of river flow were twic...
Train B crosses Train A, which is approaching from the opposite direction, in 28 seconds. If the combined length of Train A and Train B is 2240 meters, ...
Krishna covers a certain distance by train at 25 km/hr. and the equal distance on foot at 4 km/hr. If the time taken by him for the whole journey be 5 ...
