Question : If 20% of a number is $\frac{1}{6}$th of another number, what is the ratio of the first number to the second number?

Question : In an office of 900 employees, on a particular day, except for 10% of the female employees, all employees were present. On the next day, except for 8% of the male employees, all employees were present. The number of employees present on each of these two days was the same.

Question : If the ratio of the volumes of two cylinders is 7 : 5 and the ratio of their heights is 5 : 7, then what is the ratio of their radii?

Question : The ratio of speed of the three racers is 5 : 2 : 1. What is the respective ratio of time taken by the three racers to cover the same distance?

Question : The speeds of the three cars are in the ratio of 1 : 3 : 5. The ratio among the time taken by these cars to travel the same distance is _____.