Suppose that 20 men build a house in 6-days. If men are increased to 30 then they take 4-days to build the same house. If men become 40, they take 2-days to build the house.
i.e. It can be seen that as the no. of men is
increased, the time taken to build the house is decreased in the same ratio. In other words,
If increased in one quantity causes decrease in other quantity or decrease in one quantity, then we say that both quantities are inversely related.
See image below about how this problem transferred into math symbols. Click it to practice using other word problem online in http://www.emathematics.net/porcentajes1.php?tp=3
How to solve a word problem that involves inverse proportion?
Problem:
It takes 175 minutes to drive home at 80 km/hr. How long will it take to drive home at 100 km/hr?
See the video below to see the procedure for solving inverse proportion problem
word_problem_proportion.docx |