self Maths Puzzle

Q. If 5 men do a job in 6 days and 10 women can do it in 5 days. In how many days can 3 men and 5 women do the same

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self Other Question

Q. How many way ALLAHABAD can b arranged taking 4 letter at a time. Meaningless also allowed. Q. In a km race, A gives B a start of 20 seconds and still beat him by 40m. However, when he gives B a start of 25 sec they finish in a dead heat. What is A's speed in m/s?