Question

If 120 machines can manufacture a toy in 200 days, then machines are required to manuacture a toy in 120 days.

• A. 200
• B. 150
• C. 250
• D. 100

Answer 1

The correct option is A 200

$\text{Number of machines}\alpha \frac{1}{\text{Number of days}}$

We know that, if two quantities X and Y are inversely proportional, then the product of the two quantities is constant.

XY = Constant

$\begin{array}{ccc}\text{Number of machines}& 120& ?\\ \text{Number of days}& 200& 120\end{array}$

$120\times 200=a\times 120$

$a=200$

Therefore, 200 machines are required to manufacture a toy in 120 days.