An object covers a distance of $20 m$ with a speed of $40 m / s$ and covers another $30 m$ in $2$ seconds. What is the average speed of the object?

20 m / s

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10 m / s

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35 m / s

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12.5 m / s

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Solution

The correct option is A $20 m / s$
$average speed = \frac{total distance}{total time}$
$= \frac{20 + 30}{\frac{20}{40} + 2}$
$= \frac{50}{(\frac{5}{2})} = 20 m s^{- 1}$

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Similar questions

An object covers half the distance with the speed of 20m/s and other half with the speed of 30m/s . Find average speed?

10 m s^{- 1}

20 m s^{- 1}

30 m s^{- 1}

40 m / s

35 m / s

\frac{1}{2}

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