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A car travels at 40 mph for 2 hour and 60 mph for 3 hour. What is its average speed.?

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A car travels at 40 mph for 2 hour and 60 mph for 3 hour. What is its average speed.?

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  1. In (2+3) hr. it travels (2x40+3x60) mi., so it travels 260 mi. in 5 hr. or 52 mi. in 1 hr.


  2. The car traveled:

    40 miles / h · 2h + 60 miles / h · 3h = 80 + 180 = 260 miles

    Then, the average speed is:

    v = 260 miles / (2 + 3) h = 52 mph

  3. 52mph!

  4. 260/5 = 52 miles per hour
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