A Train goes from P to Q with a speed of w km/h then from Q to R (QR=2PQ) with a speed of 3km/h and returns from R to P with a speed of u/2 km/h .what is the average speed of train from p and back to p

Nilanjan Mondal 6y ago

Suraj Koley 6y ago

TAJAMUL NABI 6y ago