If A :
B = 3 : 4, B : C = 5 : 6, and C : D = 7 : 8, then find B : D.

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Accepted Answer

1. Write the given ratios as fractions: $B/C=5/6$ and $C/D=7/8$.  
2. Multiply to eliminate $C$: $B/D=(B/C)	imes(C/D)=\dfrac{5}{6}	imes\dfrac{7}{8}=\dfrac{35}{48}$.  
3. So $B:D=35:48$, which is choice **(a)**.  
FINAL_ANSWER: a

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