Select only one answer

$50$

$$testers can complete

$25$

$$test cases in

$10$

$$days$.$ All testers are equally productive. A project has

$25$

$$testers and

$50$

$$test cases.

How much time will they take to complete?

$2\mathrm{.}5$

$$days

$10$

$$days

$40$

$$days

$56\mathrm{.}5$

$$days