pallavi goal is to practice 20min of maths for every 60 min of class time.how many min of maths practice should she do if the class is 90 min long.
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by unitary method
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Answer:30 min
Step-by-step explanation:
As the ratio between practise time and class duration is 20 / 60 = x (let x be new practise time required) / 90
Ie. 20/60 = x/90
(20 X 90) / 60 = x
30 = x
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