exam Maths Puzzle Numerical Ability Time and Work

6 men of the first group do 2/3 of a work in 1/3 times as compared to 4 men of the second group.find the respective ratio of the one day work of 2 men of the first group and 4 men of the second group

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exam Other Question

if a completes a circle in 25min and b complete the circle in 30 min when will thwy meet A company makes a mixture which contains 2% alcohol. If 10 litres of alcohol is added to the mixture, then the concentration increases to 5%. What is the approx. quantity of the mixture?
A. 316
B. 315
C. 310
D. 300