Question

One evening before sunset, Radha is walking towards opposite direction of sun, walks 7 km, turn her left and walk 15 km, turns right and walk 12 km. Finally , she take s a right turn and walks 25 km and stop. Now in which direction and how far is she from her starting point?

• A. 28.92 km South - East
• B. 23 km North - West
• C. 21.47 km South - East
• D. 22 km North - West

Answer 1

The correct option is C 21.47 km South - East


$(AC{)}^2=(AB{)}^2+(BC{)}^2$
$=(19{)}^2+(10{)}^2$
$=361+100\Rightarrow \sqrt{461}\Rightarrow 21.47\text{km}$ South - east.