Rocky finished a 200-meter race in 5/12 of a minute. The winner of the race used 21/25 of Rockys time to finish the race. How much time did the winner use to finish the race?

The winner uses 21 seconds to finish the race.

Step-by-step explanation:

Step 1 :

Time taken by Rocky to finish the race = 5/12 of a minute  

Time taken by the winner to finish the race  = 21/25 of Rocky's time

We need to find the actual time taken by the winner to finish the race.

Step 2 :

5/12 of a minute = 5/12 × 60 = 25 seconds

Hence Rocky takes 25 seconds to finish the race.

Since the winner takes   of Rocky's time to finish the race,

the actual time taken by the winner is   × 25  = 21 seconds

Step 3 :

The winner uses 21 seconds to finish the race.

The winner took 21 seconds to finish the race.

Step-by-step explanation:

Step 1:

First, we need to determine how long it took Rocky to finish the race. We need to calculate how much of a minute is.

We multiply the given fraction with the number of seconds in a minute to find out how long it took for Rocky.

The number of seconds in of a minute = .

It took Rocky 25 seconds to finish the race.

Step 2:

The winner of the race finished in of Rocky's time.

We need to calculate how much of Rocky's time is.

We multiply the fraction with Rocky's time.

The number of seconds in of Rocky's time =

So the winner took 21 seconds to finish the race.