Subject: General Aptitude · Chapter: Problems on Trains · Exam: · Marks: · Difficulty:
Two trains, one from Howrah to Patna and the other from Patna to Howrah, start simultaneously. After they meet, the trains reach their destinations after 9 hours and 16 hours respectively. The ratio of their speeds is :
(a)2 : 3
(b)4 : 3
(c)6 : 7
(d)9 : 16
Answer
Answer (as printed): B
Explanation
Let us name the trains as A and B. Then, (A's speed) : (B's speed) $=\sqrt{b}: \sqrt{a}=\sqrt{16}: \sqrt{9}=4: 3$.
Explanation as extracted from the printed page; notation may be imperfect.