Previously Asked in : Gate CE-forenoon season 2022 ||
1 : 5
16 : 45
2 : 15
16 : 15
Answer (Detailed Solution Below)
Option 16 : 45 is correct
Detailed Explanation :
Given \dfrac {p} {q} = \dfrac {1} {2}, \dfrac {q} {r} = \dfrac {4} {3}, \dfrac {r} {s} = \dfrac {4} {5}
\Rightarrow \dfrac {r} {s} = \dfrac {4 \times 3} {5 \times 3}
\Rightarrow \dfrac {q} {r} = \dfrac {4 \times 4} {3 \times 4}
\Rightarrow \dfrac {p} {q} = \dfrac {1 \times 8} {2 \times 8 }
From above p : q : r : s \\8 : 16 : 12 : 15
\therefore \, s = 15\\ \textrm{so} \, u = 15 \times 15 = 22.5
now \dfrac {p} {q} = \dfrac {8} {22.5}
= \dfrac {80} {225} = \dfrac {16} {45}
Correct option is : 16 : 45
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