.A truck moves at a constant speed of 90km / h for a straight highway. 1. )How far does it travel in 2 hours? 2. )How far does it travel per

Question

.A truck moves at a constant speed of 90km / h for a straight highway. 1. )How far does it travel in 2 hours? 2. )How far does it travel per second? 3.) How long will it take to travel 10km?

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Doris 3 years 2021-08-19T04:40:34+00:00 2 Answers 51 views 0

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  1. thienthi
    0
    2021-08-19T04:41:35+00:00
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    1) In 1 hour it travels 90km then in 2 hours it’s 180km traveled.

    2) it travels 90km in 1 hour
    There are 3600 seconds (60×60)
    In an hour.

    Therefore 90km/3600seconds= 0.025km or 25 metres

    3) 10km/90km = 0.11~
    0.11 x 60 minutes = 6.67 minutes ~

  2. mocmien2
    0
    2021-08-19T04:42:32+00:00
    Reply

    Answer:

    1) 180 km

    2) 25 m

    3) 6 min 40 sec

    Explanation:

    1) Distance = rate × time

    d = (90 km/hr) × (2 hr)

    d = 180 km

    2) Convert km/hr to m/s.

    1 km = 1000 m, and 1 hr = 3600 s.

    90 km/hr × (1000 m / 1 km) × (1 hr / 3600 s) = 25 m/s

    So the truck moves 25 meters per second.

    3) Distance = rate × time

    10 km = (90 km/hr) × t

    t = 1/9 hr

    t = 6 min 40 sec

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