Question

at the beginning of a month a factory has enough material to make 240 tonnes of Steels in a month.If 60more tonnes of steel is to be made that month ,how long will the materials last

Answer 1

solution:-
 
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, less days the material will last.
This is an inverse proportion.

240 : 300 : : 30 : x

300x = 240*30
x = 7200/300
x = 24
So, the material will last for 24 days.
Answer.

Answer 2

240:300=30:x
300x=240*30
x=7200/300
x=24
therefore the materials last for 24 days