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Time taken by pipe ‘A’ and pipe ‘B’, together to fill the tank = 5/0.2 = 25 hours Let the total capacity of tank = 150 units Efficiency of pipe (A + B) = 150/25 = 6 units/hour Efficiency of pipe ‘C’ = 150/30 = 5 units/hour Tank filled by pipe (A + B) in 24 hours = 24 × 6 = 144 units Time taken by all three pipes to fill the remaining tank = (150 – 144)/(6 – 5) = 6 hours Total time taken = 24 + 6 = 30 hours
If digits of each number are arranged is ascending order from left to right within the number, how many number/ numbers thus formed would be perfect squ...
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