An aeroplane flies from place A to place B at the speed of 500 km/hr. On the return journey , its speed is 700 km/hr. The average speed of the aeroplane for the entire journey is `566 2/3k m//h r` b. `583 1/3k m//h r` c. `83 2/3k m//h r` d. `600\ k m//h r`

A train travels at a speed of 30 km/hr for 12 minutes and at a speed of 4 km/hr for the next 8 minutes. The average speed of the train for this journey is 30 k m//h r b. 36 k m//h r c. 37. k m//h r d. 48 k m//h r

A car travels the first one third of a certain distant with a speed of 10 km/hr, the next one third distant with a speed of 20 km/hr and the last one third distance with a speed of 60 km/hr. The average speed of the car for the whole journey is 18 k m//h r b. 24 k m//h r c. 30 k m//h r d. 36 k m//h r

A car travels the first one-third of a certain distance with a speed of 10 k m//h r the next one-third distance with a speed of 20 k m//h r and the lat one-third distance with a speed of 60 k m//h r . The average speed of the car for the whole journey is 18 k m//h r b. 24 k m//h r c. 30 k m//h r d. 36 k m//h r

A particle goes A to M with a speed of 30 km/hr. and M to B with a speed of 50 km/hr. If MB = 5AM, the average speed in km/hr for the whole journey is –

A person goes from A to B with a speed of 30 km/h. He comes back from B to A with a speed of 20 km/h. What is his average speed for the entire journey ?

A train goes from P to Q with an average speed of u km/h and returns from Q to P with an average speed of v km/h. What is its average speed for the entire journey in km/h?

A car travles a distance A to B at a speed of 40km//h and returns to A at a speed of 30km//h . (i) What is the average speed of the whole journey? (ii) What is the averege velocity?