Question

Reena types 600 words in four minutes. How much time will she take to type 3150 words? Direct variation method

Answer 1

21 minute  

3150*4/600 = 21

Answer 2

USING PROPORTIONALITY METHOD,

600 words >>>>>>>>> 4 Minutes
3150 words >>>>>>>>> x Minutes

600 : 4 :: 3150 : x

PRODUCT OF MEANS = PRODUCT OF EXTREMES

4 × 3150 = 600x
=> x = 4 × 3150 / 600
=> x = 12600/600
=> x = 21

ANSWER = 21 minutes

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