Cell cycle of yeast is about

Q. Bhavana and Amita are cycling around a circular track of circumference 300 m. they start from the same point and cycle in opposite directions. Amita cycles at a speed of 22.5 m/min and she meets Bhavana every 7.5 minutes. At what time will they meet each other if they were cycling in the same direction?

Q. The time taken for 10% completion of a first order reaction is $20\text{min}$. How much time does it take for 19% completion?

Q. The $t_{\frac{1}{2}}$ of a radioactive element is 20 min. The time interval between the stages of it's $34\%$ and $67\%$ decay is

Q. A car covers 20 km in 40 mins while a bike covers 20 km in 30 mins. What is the difference in their rates?

Q. The time taken for $10\%$ completion of a first order reaction is $20$ minutes. Then, for $19\%$ completion, the reaction will take: