Answer
Verified
477.6k+ views
Hint: To solve this problem, we should be aware about the basics of unitary method. We will try to find the amount of pure ghee we can get in Rs 1 and then multiply that by 800 to get the required amount of pure ghee.
Complete step by step answer:
Now, we can use the unitary method to solve the given problem in hand. Basically, the unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value. In essence, this method is used to find the value of a unit from the value of a multiple, and hence the value of a multiple. To explain this definition,
Let’s say, 2 bags cost 50 rupees and suppose we want to know how many bags we can buy from 75 rupees. What we do is, we see how many bags can be bought for 1 rupee. Then we multiply that by 75. Thus,
For 50 rupees, we have 2 bags
For 1 rupee, we have $\dfrac{1}{25}$bags
For 75 rupees, we have $\dfrac{75}{25}$=3 bags
We use a similar methodology to solve the given problem in hand. Thus, we have,
We are given that the price is increased by Rs 20 per kg. Thus, the new price is Rs (x+20) per kg. We have,
Cost of pure ghee is Rs x+20 per kg.
Thus, in Rs 1, we would have $\dfrac{1}{x+20}$kg of pure ghee.
Now, to find the amount of pure ghee for Rs 800, we have $\dfrac{800}{x+20}$kg of pure ghee.
Hence, the correct answer is (a) $\dfrac{800}{x+20}$.
Hint: The use of unitary method is only applicable when the quantities are directly related to each other. In case a quantity is directly related to square/cube/inverse or any other operations, the unitary method yields inaccurate results. For example, if x varies as a square of y, we cannot use a unitary method between x and y variables.
Complete step by step answer:
Now, we can use the unitary method to solve the given problem in hand. Basically, the unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value. In essence, this method is used to find the value of a unit from the value of a multiple, and hence the value of a multiple. To explain this definition,
Let’s say, 2 bags cost 50 rupees and suppose we want to know how many bags we can buy from 75 rupees. What we do is, we see how many bags can be bought for 1 rupee. Then we multiply that by 75. Thus,
For 50 rupees, we have 2 bags
For 1 rupee, we have $\dfrac{1}{25}$bags
For 75 rupees, we have $\dfrac{75}{25}$=3 bags
We use a similar methodology to solve the given problem in hand. Thus, we have,
We are given that the price is increased by Rs 20 per kg. Thus, the new price is Rs (x+20) per kg. We have,
Cost of pure ghee is Rs x+20 per kg.
Thus, in Rs 1, we would have $\dfrac{1}{x+20}$kg of pure ghee.
Now, to find the amount of pure ghee for Rs 800, we have $\dfrac{800}{x+20}$kg of pure ghee.
Hence, the correct answer is (a) $\dfrac{800}{x+20}$.
Hint: The use of unitary method is only applicable when the quantities are directly related to each other. In case a quantity is directly related to square/cube/inverse or any other operations, the unitary method yields inaccurate results. For example, if x varies as a square of y, we cannot use a unitary method between x and y variables.
Recently Updated Pages
Change the following sentences into negative and interrogative class 10 english CBSE
A Paragraph on Pollution in about 100-150 Words
One cusec is equal to how many liters class 8 maths CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
What were the social economic and political conditions class 10 social science CBSE
Write a letter to the principal requesting him to grant class 10 english CBSE
Trending doubts
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
In Indian rupees 1 trillion is equal to how many c class 8 maths CBSE
How do you graph the function fx 4x class 9 maths CBSE
Why is there a time difference of about 5 hours between class 10 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Write a letter to the principal requesting him to grant class 10 english CBSE
What is the past participle of wear Is it worn or class 10 english CBSE
Why did the British treat the Muslims harshly immediately class 10 social science CBSE
A Paragraph on Pollution in about 100-150 Words