Question

A body travelling with uniform motion, travels 100 km in two and half an hour.Calculate it's speed​

Answer 1

Speed = Distance / time

$\sf \: speed = \frac{100}{2 \times \frac{1}{2} } \\ \\ = \sf \frac{100}{ \frac{5}{2} } \\ \\ = \sf \frac{100 \times 2}{5} \\ \\ \sf \: = 40 \: \: \: \frac{km}{hr}$