Calculating the ratio of the total distance travelled by the body to the time taken to cover that distance obtains the average speed.

\text{ Average speed } = \frac{\text{Total distance}}{\text{ Total time }}


v_{avg} = \frac{d}{t}

Step 1: Rewrite the time equation using the average speed formula

Given that

Average velocity, v_{avg}=-2.5\ m/s

Distance alligator crawls left side d = - 15 m ?  

Time taken to crawl t = ?

v_{avg} = \frac{d}{t}


Step 2: Calculate the total time taken to crawl.


t = \frac{- 15 m}{-2.5m/s}

t = 6 sec

Hence, total time alligator crawl, t=6\ \sec