Book Maths Puzzle Numerical Ability Log and Antilog

one litre of water was mixed to six litres of sugar solution containing 4% of sugar. What is the percentage of sugar in the solution?

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Book Other Question

21-->1211
341-->131411
1334-->112314
12244-->?
Ram and Shyam run a race of 2000 m.First, Ram gives Shyam a start of 200 m and beats him by 30 s.Next,Ram gives Shyam a start of 3 min and is beaten by 1000 m.Find the time in minutes in which Ram and Shyam can run the race separately.
a)8,10
b)4,5
c)5,9
d)6,9