2016 · Q82
A person travels 7 km eastwards and then turns right and travels 3 km and further turns right and travels 13 km. What is the shortest distance of the present position of the person from his starting point?
Elementary MathematicsTime, Speed and Distance
- A6 km
- B3√(5) km
- C7 km
- D4√(5) km
Explanation
The net displacement is 7−13 = −6 km east-west and −3 km north-south. The shortest distance is √(36+9) = √45. This equals 3√5 km, option B.