Question

a racing car covered 600 km in 3 hours 20 minutes. find is speed in metre per second.how much distance will the car cover in 50 sec?

Answer 1

$$\begin{gathered} \mathrm{Distance}\mathrm{covered}=600\mathrm{km}=600\times 1000\mathrm{m}=600000\mathrm{m} \\ \mathrm{Time}\mathrm{taken}=3\mathrm{hr}20\min =3\times 3600+20\times 60\sec =10800+1200=12000\sec \\ \mathrm{Now},\mathrm{speed}=\frac{\mathrm{distance}}{\mathrm{time}}=\frac{600000}{12000}=50\mathrm{m}/\mathrm{s} \\ \mathrm{Distance}\mathrm{covered}\mathrm{in}50\sec =\mathrm{speed}\times \mathrm{time} \\ =50\times 50 \\ =2500\mathrm{m} \\ =\frac{2500}{1000}=2.5\mathrm{km} \end{gathered}$$