Rishabh stops after going 10 km west from his office. Then he turns left and…
2020
Rishabh stops after going 10 km west from his office. Then he turns left and goes 8 km. After this, he turns left again and goes 4 km. How far is he from the starting point?
Answer: C. 10 Km — Take the office as the starting point. After moving 10 km west, he is 10 km west of the office. Turning left from west means moving south, so he goes 8 km…
- A.
18 Km
- B.
8 Km
- C.
10 Km
- D.
None of these
Attempted by 6 students.
Show answer & explanation
Correct answer: C
Take the office as the starting point.
After moving 10 km west, he is 10 km west of the office.
Turning left from west means moving south, so he goes 8 km south.
Turning left from south means moving east, so he goes 4 km east.
Net position = 6 km west and 8 km south of the starting point.
Distance from start = √(6² + 8²) = √100 = 10 km.