Question

a truck covers 10 km with the speed of 50 km/h and then further 10 km with the speed of 100km/h then, what would be the average speed of the truck​

Answer 1

150 divided by 20 equals to 7.5 km/h

Answer 2

SPEED = DISTANCE / TIME

T1 = 10 / 50 = 1 /5 H

T2  = 10 / 100 = 1 / 10 H

TOTAL TIME = T1 + T2 = 3 / 10 H

TOTAL DISTANCE = 10 + 10 = 20 KM

AVERAGE SPEED = TOTAL DISTANCE / TOTAL TIME TAKEN

AVERAGE SPEED = 200 / 3 = 66.67 KM/H