Question

a car travels a distance of 420 km in 2 hours 20 minutes• what is the speed of the car in m/ sec
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Answer 1

Step-by-step explanation:

total time = 2hours + 20 min

= 2 + 1/3 hours

= 7/3 hours

speed = distance / time

= 420 / (7/3)

= 180 km/h

speed in m/s = 180 x 1000 / 3600

= 180 x 5/18

= 50 m/s

Answer 2

Step-by-step explanation:

Dist. = speed/time

and you should convert time like this