Compare the following problems (A) if 3 US collars is equal to 180 Indian rupees then how many Indian rupees are equal to 21 US Dollars? (B) Zoya and Rajni are running equally fast on a circular track. Zoya started first and when she had run 9 laps, at that time Rajni had run 3 laps. By the time Rajni had run 15 laps, how many laps had Zoya completed? Which of the following statement is true?
Compare the following problems (A) if 3 US collars is equal to 180 Indian rupees then how many Indian rupees are equal to 21 US Dollars? (B) Zoya and Rajni are running equally fast on a circular track. Zoya started first and when she had run 9 laps, at that time Rajni had run 3 laps. By the time Rajni had run 15 laps, how many laps had Zoya completed? Which of the following statement is true? Correct Answer A is a problem based on proportions, B will require the knowledge of addition and subtraction.
Proportion is explained majorly based on ratios and fractions. Proportion is a mathematical comparison between two numbers.
- According to proportion, if two sets of given numbers are increasing or decreasing in the same ratio, then the ratios are said to be directly proportional to each other.
Key Points
In the above examples:
(A) US dollars and Indian rupee comparison is given where they are proportionate 3 US dollars are given as 180 rupees and the value of 21 dollars is asked, here dollars are increasing from 3 to 21 so dollars will also increase, hence this is related to proportion.
(B) Here Zoya started first than Rajni so this is not a problem related to proportion as lapses of Zoya and Rajni don't increase in proportions as Zoya had started first, so this is a problem related to addition and subtraction.
Hence A is a problem based on proportions, and B will require the knowledge of addition and subtraction.