A body moves due East with velocity $20\, km/hour$ and then due North with velocity $15 \,km/hour$. The resultant velocity..........$km/hour$
A body moves due East with velocity $20\, km/hour$ and then due North with velocity $15 \,km/hour$. The resultant velocity..........$km/hour$
$5$
$15$
$20$
$25$
A body moves due East with velocity $20\, km/hour$ and then due North with velocity $15 \,km/hour$. The resultant velocity..........$km/hour$
Resultant velocity${\rm{ }} = {\rm{ }}\sqrt {{\rm{2}}{{\rm{0}}^{\rm{2}}} + {{15}^2}} $
= $\sqrt {400 + 225} = \sqrt {625} = 25\;km/hr$