Question
A mixture (alcohol and water) contains 30% alcohol and
rest 140 litres water. How much alcohol should be added to the mixture to make the ratio of alcohol to water in the mixture 5:4?Solution
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‘A’ alone can complete a work in 50 hours. ‘A’ started the work alone and left after working on it for 10 hours. If ‘B’ completed the rest o...
'C' can complete a work in 18 days whereas 'D' can do the same work in 30 days.They started working together but 'C' worked with 60% of his efficiency w...
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