Quantitative Aptitude – Chain Rule
Chain rule is a very important topic in Quantitative Aptitude. Questions from chain rule will surely come in competitive exams which have aptitude section.
So, now we will discuss the basics of chain rule. This will help you to understand the concept of this topic.
What is Chain Rule ?
Definition: Chain rule is the proportional values of two quantities.
Let’s explain this,
Suppose a car was running on the road from one place to another place. Speed of that car was 60 km/h. It takes 5 hours to reach the destination. Now, if speed of the car was 50 km/h then it will reach the destination in 6 hours.
Here in this example two quantities are “speed” and “time”. These two quantities are proportional to each other. So, we can say that time depends on speed. If speed increases time will decrease and if speed decreases time will increase.
There is two type of Proportions in Chain Rule.
Direct Proportion
If on the increase or decrease of one quantity the other quantity is also increases or decreases to the same proportion, then these two quantities are said to be Direct Proportion.
Suppose, a restaurant cooks 100 bowl of rice to feed 80 customers daily. And one day 100 customer came in the restaurant. So, the restaurant owner need to cook more bowl of rice on that day. So, here bowl of rice is increase when the customer increases. This is an example of Direct Proportion.
Indirect Proportion
If on the increase of one quantity the other quantity is decreases to the same proportion and vice-versa, then these two quantities are said to be Indirect Proportion.
Suppose, A builder building a shopping mall with 1000 worker. He can finish the work in 1 year with these 1000 worker. Now, if he needs to finish it within 6 months then he needs to hire more workers to work at the project. So, here the time will decreases when the number of workers are increases. This is an example of Indirect Proportion.
So, here is the basic concepts of Chain Rule. Now if you have any query on this topic then feel free to ask us here. We will discuss your query here in www.AptitudeTricks.com.