Two cyclists start from the same place in opposite directions. One goes towards north at 18 kmph and the… · ABC26GN3727
Subject: General Aptitude · Chapter: Time and Distance
Two cyclists start from the same place in opposite directions. One goes towards north at 18 kmph and the other goes towards south at 20 kmph. What time will they take to be 47.5 km apart?
(a)$1 \frac{1}{4} \mathrm{hrs}$
(b)$2 \frac{1}{4} \mathrm{hrs}$
(c)2 hrs. 23 min.
(d)$2 \frac{1}{2} \mathrm{hrs}$
Answer
Answer (as printed): A
Explanation
To be $(18+20)$ km apart, they take 1 hour. To be 47.5 km apart, they take $\left(\frac{1}{38} \times 47.5\right) \mathrm{hrs}=1 \frac{1}{4} \mathrm{hrs}$.
Explanation as extracted from the printed page; notation may be imperfect.