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Chain Rule - General Aptitude

Q1:

If a quarter kg of potato costs 60 paise, how many paise will 200 gm cost?

A 48 paise

B 54 paise

C 56 paise

D 72 paise

ANS:A - 48 paise

Let the required weight be x kg. Less weight, Less cost (Direct Proportion)  250 : 200 :: 60 : x       250 x x = (200 x 60)

 x= (200 x 60)
250
 x = 48.