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SACHIN VERMA

· started a discussion

· 1 Months ago

wrong solution provided (Question: 108531.0 )

answer must be a/b or b/a

Question:

If two person A and B start at the same time in opposite direction from two points and after passing each other they complete the journey in a and b hours respectively, then the ratio of A’s and B’s speed will be:

Options:
A) \(\sqrt[]{a}:\sqrt[]{b}\)
B) \(\sqrt[]{b}:\sqrt[]{a}\)
C) \(\sqrt[]{a}+\sqrt[]{b}:\sqrt[]{a}-\sqrt[]{b}\)
D) None of these
Solution:
Ans: (b)

Let total distance be D km. and A’s speed be x km/hr and B’s speed be y km/hr.


\(\cfrac{v1}{v2}\)=\(\sqrt{\cfrac{t2}{t1}}\)
\(\Rightarrow\)\(\cfrac{x}{y}\)=\(\sqrt{\cfrac{b}{a}}\)

\(\Rightarrow\)\(\cfrac{x}{y}\)=\(\cfrac{\surd b}{\surd a}\)

SACHIN VERMA

· commented

· 1 Months ago

explain don't just mug formula how can time on linear path be a square root function

Knowledge Expert

· commented

· 1 Months ago

Given answer is correct because Its formula.
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