Question

In a juice shop 2 employees serve 20 customer in 1 hour. If the employees are incresed by 2, the time take to serve same number of customer is .

• A. 1 h
• B. 30 min
• C. 15 min
• D. 45 min

Answer 1

The correct option is B 30 min

Given,
Number of customer = 20
Time taken by 2 employees = 1 h
Increased number of employees $=2+2=4$

Let the time taken be $x$ h.

The number of customers is constant, as the employees increse the time taken will reduce. Time and numner of employees vary inversly.

$\begin{array}{ccc}\text{Exmployees}& \text{2}& \text{4}\\ \text{Time}& 1& x\end{array}$

$\therefore 2\times 1=4\times x$
$x=\frac{2}{4}=\frac{1}{2}$ h
$x=\frac{60}{2}$ min
$x=30$ min

4 employees takes 30 min to serve 20 customers.