Question

A printing machine can print 250 newspapers in 2 hours and 5 minutes. How many newspapers will it print in total if it is operated for half an hour more?

• A. 310 newspapers
• B. 390 newspapers
• C. 250 newspapers
• D. 300 newspapers

Answer 1

The correct option is A 310 newspapers

Given,
The number of newspapers printed in 2 hours and 5 minutes (125 minutes) = 250

We know that, if the time increases, the number of newspapers printed will also increase.

$\text{So, Time}\left(x\right)\propto \text{Number of newspapers}\left(y\right)$

$\therefore \frac{x_1}{y_1}=\frac{x_2}{y_2}$

Given,
$x_1=125\text{minutes}$
$y_1=250\text{newspapers}$
$x_2=(125+30)\text{minutes}\text{= 155 minutes}$
$y_2=\text{No. of newspapers printed}$
$\text{in 155 minutes}$

$\Rightarrow \frac{125}{250}=\frac{155}{y_2}$
$\Rightarrow y_2=\frac{155\times 250}{125}$
$\Rightarrow y_2=155\times 2=310$

$\text{No.of newspapers printed in}\text{155 minutes = 310}$