Question

A train is travelling23m/s its speed expressed in km is

Answer 1

$60 sec = 1 min$

$60 min =1 hr$

$1 km = 1000 m$

$\frac{23m}{s}*\frac{60s}{1min}*\frac{1km}{1000m}*\frac{60min}{1hr} =82.8 km/hr$