Question

A car travels 30km at a uniform speed of 60km/h and the next 30km at a uniform speed of
90km/h. find the average speed
pls ans very urgent

Answer 1

Explanation:

For the first 30 km travelled, speed = 60 km/h. = 0.5 h-1 or 30 min. = 0.75 h-1 or 45 min. = 75 min or 1.25 h.

Answer 2

GIVEN

(first time)

[Time = 1 hour

Speed = 60 km

Distance travelled = 30 km]

(Second time)

[Time = 1 hour

Distance travelled = 30 km

Speed = 90km]

TOTAL DISTANCE COVERED = 30+30=60

Total time taken = 2 hour

Average speed = 60/2=30km ans.