Question
At a game of billiards, A can give B 15 points in 60 and A can give C to 20 points in 60. How many points can B give C in a game of 90?
Answer: Option C
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A : B = 60 : 45.
A : C = 60 : 40.
\(\frac{B}{C}=\left(\frac{B}{A}\times\frac{A}{C}\right)=\left(\frac{45}{60}\times\frac{60}{40}\right)=\frac{45}{40}=\frac{90}{80}= 90:80.\)
So, B can give C 10 points in a game of 90.
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