Question

Ravi travelled 4 km straight towards south. He turned left and travelled 6 km straight, then tumed right and travelled 4 km straight. How far is he from the starting point?

• A. 8 km
• B. 10 km
• C. 12 km
• D. 18 km

Answer 1

The correct option is B 10 km

B is the finishing point and is 10 km. from the point A. The Aerial distance of A from B is 10 km, calculated as below
${\left(AB\right)}^2={\left(AD\right)}^2+{\left(DB\right)}^2={\left(8\right)}^2+{\left(6\right)}^2=64+36=100$
$\therefore AB=10km$