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Two pipes A and B can fill a tank in 6 hours and 4 hours respectively. If they are opened on alternate hours and if pipe A is opened first, then the tank shall be filled in:
X, Y and Z can do a piece of work in 46 days, 92 days and 23 days, respectively, X started the work. Y joined him after 2 days. If Z joined them after 8 days from the beginning then for how many days did X work?
For doing a certain work, the efficiencies of A, B and C are in the ratio 2 : 3 : 5. Working together, they can complete the same work in 15 days. B and C can complete 80% of the original work in:
A merchant purchased 650 kg of wheat at ₹50 per kg. He sold 250 kg of it at a profit of 24% and 200 kg at a loss of 24%. At what rate per kg (in ₹) should he sell the remaining wheat to gain 20% on his initial investment?