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When 20% of 40% of half of a number 'm' is added to 3/4th of 20% of itself, then a second number is obtained which is 21 less than the 40% of m. What is the difference between first and second number?
- a)76
- b)81
- c)72
- d)70
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
When 20% of 40% of half of a number 'm' is added to 3/4th of 20% of i...
First number = m
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Second number = (40% of m ) - 21
According to the question:
20% of 40% of (m/2) + (3/4) x 20% of m = (40% of m) - 21
m = 100
Second number = (40% of m) - 21 = 40% of 100 - 21 = 19
Difference = 100 - 19 = 81
Most Upvoted Answer
When 20% of 40% of half of a number 'm' is added to 3/4th of 20% of i...
Understanding the Problem:
Given:
- 20% of 40% of half of a number 'm' is added to 3/4th of 20% of itself.
- The result is 21 less than the 40% of m.
Let's Break Down the Problem:
- Find 20% of 40% of half of 'm': 0.2 x 0.4 x 0.5 x m = 0.04m
- Find 3/4th of 20% of 'm': 0.75 x 0.2 x m = 0.15m
- Add the two results: 0.04m + 0.15m = 0.19m
- According to the problem, the above sum is 21 less than 40% of 'm':
0.19m = 0.4m - 21
0.21m = 21
m = 100
Calculating the First Number:
- First Number = 0.19m = 0.19 x 100 = 19
Calculating the Second Number:
- Second Number = 0.4m - 21 = 0.4 x 100 - 21 = 40 - 21 = 19
Calculating the Difference:
- Difference = Second Number - First Number = 19 - 19 = 0
Therefore, the difference between the first and second numbers is 0. This means that the first number and the second number are the same. The correct answer may be a typo in the options provided.
Given:
- 20% of 40% of half of a number 'm' is added to 3/4th of 20% of itself.
- The result is 21 less than the 40% of m.
Let's Break Down the Problem:
- Find 20% of 40% of half of 'm': 0.2 x 0.4 x 0.5 x m = 0.04m
- Find 3/4th of 20% of 'm': 0.75 x 0.2 x m = 0.15m
- Add the two results: 0.04m + 0.15m = 0.19m
- According to the problem, the above sum is 21 less than 40% of 'm':
0.19m = 0.4m - 21
0.21m = 21
m = 100
Calculating the First Number:
- First Number = 0.19m = 0.19 x 100 = 19
Calculating the Second Number:
- Second Number = 0.4m - 21 = 0.4 x 100 - 21 = 40 - 21 = 19
Calculating the Difference:
- Difference = Second Number - First Number = 19 - 19 = 0
Therefore, the difference between the first and second numbers is 0. This means that the first number and the second number are the same. The correct answer may be a typo in the options provided.
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When 20% of 40% of half of a number 'm' is added to 3/4th of 20% of itself, then a second number is obtained which is 21 less than the 40% of m. What is the difference between first and second number?a)76b)81c)72d)70Correct answer is option 'B'. Can you explain this answer?
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When 20% of 40% of half of a number 'm' is added to 3/4th of 20% of itself, then a second number is obtained which is 21 less than the 40% of m. What is the difference between first and second number?a)76b)81c)72d)70Correct answer is option 'B'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about When 20% of 40% of half of a number 'm' is added to 3/4th of 20% of itself, then a second number is obtained which is 21 less than the 40% of m. What is the difference between first and second number?a)76b)81c)72d)70Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When 20% of 40% of half of a number 'm' is added to 3/4th of 20% of itself, then a second number is obtained which is 21 less than the 40% of m. What is the difference between first and second number?a)76b)81c)72d)70Correct answer is option 'B'. Can you explain this answer?.
When 20% of 40% of half of a number 'm' is added to 3/4th of 20% of itself, then a second number is obtained which is 21 less than the 40% of m. What is the difference between first and second number?a)76b)81c)72d)70Correct answer is option 'B'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about When 20% of 40% of half of a number 'm' is added to 3/4th of 20% of itself, then a second number is obtained which is 21 less than the 40% of m. What is the difference between first and second number?a)76b)81c)72d)70Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for When 20% of 40% of half of a number 'm' is added to 3/4th of 20% of itself, then a second number is obtained which is 21 less than the 40% of m. What is the difference between first and second number?a)76b)81c)72d)70Correct answer is option 'B'. Can you explain this answer?.
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