Question

a train covers a distance at an average speed of 60 km/h in 12 hours.what should be the speed of the train if the same distance is to be covered in 10 hours

Answer 1

Dear student
$$\begin{gathered} \mathrm{Distance}\mathrm{covered}\mathrm{by}\mathrm{the}\mathrm{train}\mathrm{when}\mathrm{speed}\mathrm{is}60\mathrm{km}/\mathrm{hr}=\mathrm{Speed}\times \mathrm{Time}=60\times 12=720\mathrm{km} \\ \mathrm{Now},\mathrm{Speed}\mathrm{of}\mathrm{the}\mathrm{train}\mathrm{when}\mathrm{it}\mathrm{covers}720\mathrm{km}\mathrm{in}10\mathrm{hours}=\frac{\mathrm{Distnace}}{\mathrm{Time}}=\frac{720}{10}=72\mathrm{km}/\mathrm{hr} \end{gathered}$$
Regards