Question

A body travels of 30kmph for
1\3of a journey time during the
remaining journey time he travels
with a speed of 60kmph. Find
the average speed?​

Answer 1

Answer:

45 km/h

Step-by-step explanation:

Let thew total distance of the journey be x.

Distance(1) first traveled = x/3  (one third)

Speed(1) along the distance = 30 km/h

Time(1) taken for the distance = distance(1) / speed(1) = x/90

Distance(2) traveled = x - (x/3) = 2x/3

Speed(2) along the distance = 60 km/h

Time(2) taken to travel the distance = distance(2) / speed(2) = 2x/180 = x/90

Average speed = total distance / total time

                          = x / (x/90  +  x/90)

                          = x / (2x/90) = 45km/h

Hope it will help u friend!