Exercise V — task. Science CBSE, Class 7.

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The odometer of a car reads \(57321.0\ km\) when the clock shows the time \(08:30\ AM\). What is the distance moved by the car, if at \(08:50\ AM\), the odometer reading has changed to \(57336.0\ km\)? Calculate the speed of the car in \(km/min\) during this time. Express the speed in \(km/h\) also.

\(Distance\ covered\ by\ the\ car\) \(=\)

Time taken by the car \(=\)

The formula for the speed is given as

\(Speed\ =\) \(\frac {Distance\ travelled}{Time\ taken}\)
\(Speed\ =\) \({Time\ taken} \times{Distance\ travelled}\)
\(Speed\ =\) \(\frac {1}{Time\ taken}\)
\(Uniform\ motion\ =\) \(\frac {Time\ period}{Speed}\)

On substituting the given values in the formula, we get the speed as .

\begin{array}{l} 1 hour = i minutes \\ 20 minutes = \frac{i}{i} h \end{array}

Thus, the speed of the car is found to be .

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5. Exercise V

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