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Laptops do 40% of the work in 10 days, or 10 × 6 = 60 hours. So the rest of the (i.e., 60% of the work) can be done in, => (60 × 60)/40 = 90 hours This 90 hours of work has to be done in the remaining (20 – 10) = 10 days. Laptops have to work (90/10) = 9 hours a day to complete the work in the planned time.
A container has 60 liters of a mixture of milk and water in the ratio of 3:2. How many liters of water should be added to make the ratio 2:3?