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Sapna Bharti

· started a discussion

· 1 Months ago

i am unable to understand why 16/25 is written over there (Question:102900.0)

why 25 sir/mam?

Question:

Nine litres are drawn from a cask full of water and it is then filled with milk, Nine litres of mixture are drawn and the cask is again filled with milk, the quantity of water now left in the cask to that of the milk in it is 16 : 9. How much does the cask hold?

Options:
A) 40 litres
B) 45 litres
C) 50 litres 
D) 55 litres
E) None of these
Solution:

Knowledge Expert

· commented

· 1 Months ago

Dear Student, Let there be x litres water in the cask (After 2nd operation,water left in the cask )/(Volume of cask) =((x - 9)/x)^2=16/25 ⇒(x - 9)/x=4/5 ⇒ x = 45 Keep Learning with Us Best Wishes Team Toprankers
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