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Rekha moves 15 km in East direction, then turns towards North and moves 4 km. From here she turns towards West and travels 12 km. How far and in which direction is she from her starting point?

Solution

✅ Correct Option: 2

Let the starting point be at the origin (0, 0).

After moving 15 km East, Rekha is at position (15, 0).


After turning North and moving 4 km, Rekha is at position (15, 4).


After turning West and traveling 12 km, Rekha is at position:

(15−12,4)=(3,4)(15 - 12, 4) = (3, 4)


The distance from the starting point (0, 0) to final position (3, 4) is:

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

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

d=25d = \sqrt{25}

d=5d = 5 km


The final position is (3, 4), meaning Rekha is 3 km to the East and 4 km to the North of her starting point.

Therefore, she is in the North-East direction.


Rekha is 5 km away from her starting point in the North-East direction.

The answer is Option 2: 5 km, North-East.

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