Question

$A$ and $B$ start from the same point and at the same time with speeds $15$kmph and $12$kmph respectively.Find the distance between $A$ and $B$ after $6$ hours if both move in:

$\left(i\right)$same direction

$\left(ii\right)$ the opposite directions.

Answer 1

$A^{\prime }s$ speed$=15$kmph

$B^{\prime }s$ speed$=12$kmph

Distance covered by $A$ in $6$ hours$=15\times 6=90$km

Distance covered by $B$ in $6$ hours$=12\times 6=72$km

$\left(i\right)$Distance between $A$ and $B$ when they move in the same direction$=90-72=18$km

$\left(ii\right)$Distance between $A$ and $B$ when they move in the opposite direction$=90+72=162$km