8. At the beginning of a month, a factory has enough materials to make 240 tonnes of stein a month. If 60 more tonnes of steel is to be made that month, how long will timaterials last?​

In 30 days steel manufactured =240 tonnes

Now, 60 more tonnes of steel is to be manufactured in that month.

So,

240+60=300 Tonnes of steel to be manufactured in the month.

Therefore,

More steel manufactured, fewer days the material will last.

This is an inverse proportion.

240:300::30:x

300x=240.30

300x=7200

x=  

300

7200

​  

x=24

So, the material will last for 24 days.