a person travel a distance of 360 km between by a car. he covers the first half at a speed of 60 km/h and the other one half at 45 km/h find

Question

a person travel a distance of 360 km between by a car. he covers the first half at a speed of 60 km/h and the other one half at 45 km/h find :
(a) the total time taken to complete the entire journey
(b) average speed of the car​

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Peyton 1 month 2021-08-13T08:58:48+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-08-13T09:00:05+00:00

    Answer:

    the half of 360km=360/2=180km

    Step-by-step explanation:

    he covers first 180 km in speed = 60km / HR.

    speed = distance / time

    60km = 180km / x

    60 km / 180 km = x

    30km = x

    x = 30 km

    he covers second 180 km in speed = 45 km / HR.

    speed = distance / time

    45km = 180km / x

    45km/180km=x

    0.25km=x

    x=0.25km

    total speed to complete the journey = 30+0.25=30.25km/hr.

    total time to complete the journey = time =distance/time=360/30.25=1,440km

    the average speed of a car = 30.25km

    0
    2021-08-13T09:00:39+00:00

    Answer:

    average speed is 2v1v2/v1+v2=2×45×60/105=51.4

    total time is 360/51.4

    7hr

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