Skip to main contentSkip to solution

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

✅ Correct Option: 2

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:

Distance=(x2−x1)2+(y2−y1)2\text{Distance} = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}

=(4−0)2+(−3−0)2= \sqrt{(4 - 0)^2 + (-3 - 0)^2}

=16+9= \sqrt{16 + 9}

=25= \sqrt{25}

=5= 5

Therefore, the shortest distance between home and office is 5 km.

Keyboard Shortcuts

  • Left arrow: Previous question
  • Right arrow: Next question
  • S key: Jump to solution
  • Q key: Jump to question