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The area under the speed time graph given the total distance covered by car. What…

The area under the speed time graph given the total distance covered by car. What is the average velocity to two places of decimals?

  • A.
    17.72 meter/sec.
  • B.
    21.67 meters/sec
  • C.
    2.5 meter/sec.
  • D.
    20.45 meters/sec.
  • E.
    13.33 meter/sec.
Correct Answer: Option D
Explanation

Time(sec) areas of the three sides are (frac{1}{2}) x 2 x 20 = 20 x 2 = 40
(frac{1}{2}) x 4 x 20 = 40
40 + 40 = 80
vel. = (frac{80}{4})
20 + 0.45 = 20.45 meter/sec.