Question

A car determines the distance between two places, with the first half distance moves 30 kilometers per hour and the other half distance with a 50 km per hour move, then the average move of the car is for the whole trip

Answer 1

Heya

Let the total distance travelled be x

T1 = (x/2)/30

= x/60

T2 = (x/2)/50

= x/100

Average speed = total distance/total time

=x/ (x/60)+(x/100)

= x/ x(1/60+1/100)

= 1/(5+3)/300

= 300/8

= 37.5kmph

Hope it helps! ^_^