Question

Va travels first half of the distance at 50m/s and second half at 75m/s the total distance travelled is 3k/m find the average speed of travel for the entire journey

Answer 1

time for the first case :

1500/50= 30 seconds

for the second case:

1500/75 =20 s

av. speed = 3000/(30+20) = 3000/50 = 60 m/s