Question

Two cars started moving from a point, one toward north at 30 km/hr & other toward East at 40 km/hr : distance b/w them after 2 hr is ___

Answer 1

In two hour first car has travelled a distance of $2\times 30=60km$ toward north

Second car would have travelled $2\times 40=80km$ toward east.

distance between them can be calculated using pythagoras theorem.

$A{B}^2=O{A}^2+O{B}^{2}A{B}^2=(80{)}^2+(60{)}^2=6400+3600=10000AB=100km$