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24. The age of two people is in the ratio 6:8, the sum of their ages is 77 after 2 years the ratio of their ages becomes 5:7, what is their present age?

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23.***** Leena cut small cubes of 10 cubic cms each, which she joined to form a cube with 10 cm length, 5 cm in depth and 5 cm wide. How many more small cubes does she require to form a perfect cube? 25. If a and b are mixed in 3:5 ratio and b,c are mixed in 8:5 ratio if the final mixture is 35 liters, find the amount of b in the final mixture.?