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`

An aeroplane flies from place A to place B at the speed of 500km/hr .On the return journey ,its speed is 700km/hr .The average speed of the aeroplane for the entire journey is 566(2)/(3)km/hrb.583(1)/(3)km/hr c.83(2)/(3)km/hr d.600backslash km/hr

A car travels a distance from A to B at a speed of 60 km h^-1 and returns to A at a speed of 30 km h^-1 . The average speed of the car for the whole journey is:

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 bus travel its onward journey with a constant speed of 30km//hr and its return journey with a constant speed of 60km//hr .the average speed for its entire journey is A. 90 k m / h r B. 45 k m / h r C. 40 k m / h r D. 15 k m / h r

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?