A website Maths Puzzle Numerical Ability

If an arc forms 72 degree at the centre of the circle, then what is the ratio of its length ?

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A website Other Question

Complete the following series:
1, 4, 5, 6, 7, 9, 11, __?
a can do a work in 30 days b can 40 and c 50 days . a, b and a,c do that work alternately.in how many days ,work will complete