Kanika drives 6 km west from her home and turns left and drives 3 km and then turns left again and drives 10 km to reach her office. What is the shortest distance between her home and office?
Kanika drives 6 km west from her home and turns left and drives 3 km and then turns left again and drives 10 km to reach her office. What is the shortest distance between her home and office?
Solution
Let Home be the starting point and track Kanika's movements.
Starting from Home:
- Drives 6 km west
- Turns left (now facing south) and drives 3 km
- Turns left again (now facing east) and drives 10 km to reach Office
Place Home at coordinates (0, 0) and track the position after each movement:
Starting position: Home = (0, 0)
After 6 km west: Position = (-6, 0)
After turning left and driving 3 km south: Position = (-6, -3)
After turning left and driving 10 km east: Position = (-6 + 10, -3) = (4, -3)
Therefore, Office = (4, -3)
The shortest distance is the straight line from Home to Office.
Home: (0, 0)
Office: (4, -3)
Using the distance formula:
Therefore, the shortest distance between home and office is 5 km.
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2022: 17 Aug Shift 1