ABC26GN3339 · Chain Rule
Subject: General Aptitude · Chapter: Chain Rule · Exam: 2003 · Marks: · Difficulty:
If 6 persons working 8 hours a day earn $₹ 8400$ per week, then 9 persons working 6 hours a day will earn per week
(a)₹ 8400
(b)₹ 9450
(c)₹ 16200
(d)₹ 16800
Answer
Explanation
Let the weekly earning be ₹ $x$.More persons, More earning Less working hours, Less earning (Direct Proportion) Persons $\left.\begin{array}{l}6: 9 \\ 8: 6\end{array}\right\}:: 8400: x$ $\therefore 6 \times 8 \times x=9 \times 6 \times 8400$ $\Leftrightarrow x=\left(\frac{9 \times 6 \times 8400}{6 \times 8}\right)=9450$.
Explanation as extracted from the printed page; notation may be imperfect.
Open in whiteboard · Browse this chapter in the app