Question

A train covers a distance of 10 km in 12 minutes. If its speed is decreased by 5 km/hr then the time taken by it to cover the same distance is equal to how much?

Answer 1

$\huge\boxed{\texttt{\fcolorbox{Red}{aqua}{Hello Friend}}}$
Distance = 10 km
Time = 12 minutes = 12/60 hrs
Speed = Distance/Time
$= \frac{10}{ \frac{12}{60} } \\ = 10 \times \frac{60}{12} \\ = 50 \: km \: per \: hrs$
Now Speed is decrease by 5 km/hrs
Hence new Speed = 50 - 5 =45 km/hrs
Distance = 10 km
Time = Distance/Speed
$= \frac{10}{45} hrs \\ = \frac{10}{45} \times 60minutes \\ = 13.33min \\ = 13min$


$\huge{\red{\boxed{\boxed{\boxed{\boxed{\boxed{\underline{\underline{Hope \:it\: helps\: you}}}}}}}}}$