Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Trending News

Promoted
foofightersandacdc
foofightersandacdc asked in Science & MathematicsPhysics · 1 decade ago

help with physics homework!!!?

you drive 102 km/r for a half-hour and then drive 54 km/h for an hour and a half

what is your average speed? (GIVE UNITS)

2 Answers

Relevance
  • Fireman
    Lv 7
    1 decade ago
    Favorite Answer

    1st Phase:-

    t1 = 0.5 hr

    =>s1 = v1 x t1 = 102 x 0.5 = 61 km

    2nd Phase:-

    =>t2 = 1.5

    =>s2 = v2 x t2 = 54 x 1.5 = 81 km

    =>Average speed (v) = (s1+s2)/(t1+t2) = (61+81)/(0.5+1.5) = 71 km/hr

  • ?
    1 decade ago

    102 + 54 = 156

    156/2= 78km/h

Still have questions? Get your answers by asking now.