Question

The science teacher is teaching a lesson about speedand is using an electrical mini car. The teacher sets theremote control and makes the mini car travel at aconstant speed on the floor of the classroom. The minicar travels 1/20 of the length of the classroom in 4/5seconds. At that rate, how many seconds does it takethe mini car to travel the entire length of the classroom?

Answer 1

Given that the mini car covers 1/20 of the length of the classroom in 4/5 seconds, let's find the total time it will take to cover the entire length of the classroom.

Let T be the total time in seconds

`(1)/(20)\text{ of T = }(4)/(5)\sec onds`
`T=(4)/(5)/(1)/(20)`

Now, change the division sign to multiplication and flip the fraction on the right.

`T=(4)/(5)*(20)/(1)=(80)/(5)=\text{ 16 seconds}`

Therefore, it will take the mini car 16 seconds the travel the entire length of the classrom.

ANSWER:

16 seconds