Discussion of Question with ID = 050 under Distance-and-Time

This is the discussion forum for this question. If you find any mistakes in the solution, or if you have a better solution, then this is the right place to discuss. A healthy discussion helps all of us, so you are requested to be polite and soft, even if you disagree with the views of others. The question and its current solution has also been given on this page.

Advertisement

Question

Two trains start simultaneously. The first train moves from Jammu to Tawi, whereas the second train moves from Tawi to Jammu. After they meet at a point in between, they respectively take 4 hours and 9 hours to reach their destinations. What is the ratio of their speeds?

A

${3/2}$.

B

${5/2}$.

C

${7/2}$.

D

${9/4}$.

Soln.
Ans: a

If they take $t_1 and t_2$ hours respectively to reach their destinations, then the ratio of their speeds is $√t_2 : √t_1$. So we get $√9 : √4$, which gives 3 : 2, or ${3/2}$.

Comments and Discussion