(ii) If the speed of a car is decreased by 12 km/h, it takes 1 hour more to cover a
distance of 240 km. Find the original spe

Question

(ii) If the speed of a car is decreased by 12 km/h, it takes 1 hour more to cover a
distance of 240 km. Find the original speed of the car.​

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Emma 2 months 2021-07-30T03:41:42+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-07-30T03:42:58+00:00

    Answer:

    .original speed of the car is 48 km/hr

    Step-by-step explanation:

    Let s & t be the original speed & time taken.

    So s×t = 240

    t = 240/s

    Also (s – 8)(t+1) = 240

    st+s-8t-8 = 240

    Applying the value of st & t in above equation

    240+s-8×240/s-8 = 240

    s -1920/s = 8

    s²-1920 = 8s

    s²-8s-1920 = 0

    (s-48)(s+40) = 0

    So s = 48 or -40

    Since s can not be negative, s = 48

    So original speed of the car is 48 km/hr

    I hope it’s help you

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    0
    2021-07-30T03:43:06+00:00

    Answer:

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