Question

If A, B and C are the cities in a line respectively the distance between A and C is 105 km while the distance between A and B is 63 km then find the distance between B and C.

Answer 1

Distance between $A$ and $C\therefore AC=105$km

Distance between $A$ and $B\therefore AB=63$km

A person travels from $A$ to $B$ to $C$

$\Rightarrow AC=AB+BC$

$\Rightarrow 105=63+BC$

$\Rightarrow BC=105-63=42$km

$\therefore$ Distance between $B$ and$C\therefore BC=42$km