Because quantities are equal, we average the fractions. Adding 1/10, 9/50 and 1/20 gives 33/100; dividing this sum by 3 yields a final nitrogen fraction of 11/100 or 0.11.
Cbse Class 9 Maths Ganita Manjari Part 2 Solutions
class 9 maths ganita manjari part 2 chapter 10 question answer
When three equal quantities of fertilisers are mixed, each contributes equally to the total volume. We calculate the arithmetic mean of the three nitrogen fractions. Simplifying 3/60 to 1/20 and using the common denominator 100, the sum is 10/100 + 18/100 + 5/100 = 33/100. Dividing this sum by 3 gives the final combined fraction of nitrogen in the mixture as 11/100.
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