Question

Rahul Ghosh walks from A to B at 8 km/h
and comes back from B to A at 12 km/h.
What is his average speed for the entire
journey?
(1) 9 kmph
(2) 9.6 kmph
(3) 10 kmph
(4) 12 kmph

Answer 1

Answer:

(3) 10 km per hour

Average Speed = Sum of speeds/2

Answer 2

Answer:

Step-by-step explanation:

As the speed is not constant in that case the Avg Speed will be

(S1xT1)+(S2xT2)/(T1+T2) i.e. let Total one side distance is x Kms so T1 will be x/8 similarly T2 will be x/12 so as per Avg speedFormula

Avg Speed will be 48/5=9.6 Kmph