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Deadman_626
Deadman_626 asked in Science & MathematicsMathematics · 7 months ago

Simple time problem can anyone solve it?

I'm travelling a distance of 82.2km in 1 h 26 min, what's my speed?

I need to arrive there before 5:20pm, what time should I start? Note: I need an exact time not an exaggerated time.

3 Answers

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  • charlatan
    Lv 7
    7 months ago

    5:20 -1:26 = 3:54

    start at 3:54 pm.

    82.2 km / 86 min

    82.2*60/86=57.35 kmph

  • ?
    Lv 7
    7 months ago

    You went 411/5 km in 43/30 hours.

    Your speed is the distance you travel in 1 hour, so that would be

    411/5 * 30/43 so the exact answer is 2466/43 km/hr

    A decimal approximation of that is 57.3488 km/hour

    If you are happy with 5:19 pm as arriving there just before 5:20pm, then

    leave at 3:53 pm as the other post said.

    To check that this works, split the time as 1 hour 7 mins + extra 19 mins

    3:53 + 7 mins is 4 pm. 4 pm + 19 mins is 4:19, (1 min early).

  • ?
    Lv 7
    7 months ago

    82.2/(1 + 26/60)≈ 57.3488372... km/h

    3:53 pm

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