Class 11 Linear Inequalities Miscellaneous Exercise Chapter 5 in Tamil / Cbse New Syllabus /Kalvikan
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11. A solution is to be kept between 68° F and 77° F. What is the range in temperature
in degree Celsius (C) if the Celsius / Fahrenheit (F) conversion formula is given by
F =
9
C/5
+ 32 ?
12. A solution of 8% boric acid is to be diluted by adding a 2% boric acid solution to
it. The resulting mixture is to be more than 4% but less than 6% boric acid. If we have
640 litres of the 8% solution, how many litres of the 2% solution will have to be added?
13. How many litres of water will have to be added to 1125 litres of the 45% solution
of acid so that the resulting mixture will contain more than 25% but less than 30% acid
content?
14. IQ of a person is given by the formula
IQ =
MA
/CA × 100,
where MA is mental age and CA is chronological age. If 80 ≤ IQ ≤ 140 for a group of
12 years old children, find the range of their mental age.
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13 сен 2024
