CA Foundation · Quantitative Aptitude · Direction Tests
Nisha walks 8 km east, then 15 km north, then returns to her starting point by the straight path. What total distance does she cover?
She covers 40 km in total. The east and north legs add to 23 km, and the straight return is the hypotenuse of an 8-15-17 triangle, which is 17 km. Adding gives 8 + 15 + 17 = 40 km.
- A23 km
- B40 kmCorrect
- C34 km
- D17 km
Explanation
The return path is the hypotenuse: sqrt(8^2 + 15^2) = sqrt(289) = 17 km. Total distance = 8 + 15 + 17 = 40 km. Option 23 km ignores the return leg, and 34 km counts the hypotenuse twice.
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