Question

The odometer of can reads 10532.0km at the start of journey and at end it reads 10850.0 km if car takes 12hrs to complete its journey then calculate its average speed in km/ hr,km/min and km/s

Answer 1

Dear Student,

$$\begin{gathered} \mathrm{Average}\mathrm{Speed}=\frac{\mathrm{Total}\mathrm{distance}}{\mathrm{total}\mathrm{time}\mathrm{taken}} \\ \mathrm{journey}\mathrm{start}\mathrm{at}=10532\mathrm{km} \\ \mathrm{journey}\mathrm{ends}\mathrm{at}=10850\mathrm{km} \\ \mathrm{time}=12\mathrm{h}=12\times 60\min =720\min \\ \mathrm{also},\mathrm{time}=12\times 3600\mathrm{s}=43200\mathrm{s} \\ \left(1\right)\mathrm{Average}\mathrm{Speed}(\mathrm{in}\mathrm{km}/\mathrm{h})=\frac{10850-10532}{12}=26.5\mathrm{km}/\mathrm{h} \\ \left(2\right)\mathrm{Average}\mathrm{Speed}(\mathrm{in}\mathrm{km}/\min )=\frac{10850-10532}{720}=0.44\mathrm{km}/\min \\ \left(3\right)\mathrm{Average}\mathrm{Speed}(\mathrm{in}\mathrm{km}/\mathrm{s})=\frac{10850-10532}{43200}=7.36\times {10}^{-3}\mathrm{km}/\mathrm{s} \end{gathered}$$