CA Foundation · Quantitative Aptitude · Direction Tests
Meera walks 5 km towards the north and then turns right and walks 12 km. How far is she from her starting point?
Meera is 13 km from her starting point. Her two walks are perpendicular, so the straight-line distance is the hypotenuse of a right triangle with legs 5 km and 12 km, which is the square root of 169, equal to 13 km.
- A17 km
- B13 kmCorrect
- C7 km
- D15 km
Explanation
After walking north and then east, the displacement is the hypotenuse of a right triangle with sides 5 and 12. Distance = sqrt(25 + 144) = sqrt(169) = 13 km. Option 17 km is wrong because it simply adds the two legs.
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