Explanation:

- The target is 272 runs.

- In the first 10 overs, the team scored with a run rate of 7.2. This means they made 72 runs in 10 overs (10 overs x 7.2 runs per over).

- Runs needed in the remaining 40 overs = Total target - Runs scored in first 10 overs = 272 - 72 = 200 runs.

- The required run rate for 40 overs is calculated by dividing the remaining runs by the remaining overs:

$\frac{200\text{ runs}}{40\text{ overs}}=5\text{ runs per over}$

- Option:2 - 5 is the correct answer.