Question

A car travels 100 meters in 5 seconds. What is the speed of the car?

speed = distance over time; 1 mile = 1609 meters

Answer 1

i need a walk through

Answer 2

by definition, the speed of the car is:
\[\Large speed = \frac{{{\text{distance}}}}{{{\text{time}}}}\]

Answer 3

100 miles is distance and

Answer 4

5 secs is time

Answer 5

So how much is 100m in miles?? 100/1609 right? :D And how much is 5 seconds in hours? 5/3600 right? :D So miles/hour = \[\frac{ 100 }{ 1609 }*\frac{ 3600 }{ 5 }\] 44.7 miles

Answer 6

if you multiply both values by 12 you will know how many metres in 1 minute

this is because 12 x 5 = 60

then multiply the answer by 60 to find how many metres in 1 hour

does that make sense..?

Answer 7

\[\Large speed = \frac{{{\text{distance}}}}{{{\text{time}}}} = \frac{{100}}{5} = ...miles/\sec \]

Answer 8

20

Answer 9

correct! it is 20 miles/seconds

Answer 10

????

Answer 11

we can change unit of measure, namely we can measure that speed in Km/hour

Answer 12

so 20 is the right answer not what they said?

Answer 13

20 miles /seconds, is your speed, and as you can see , the corresponding unit of measure is miles/seconds

Answer 14

nevertheless, if we want to change unit of measure, of course, we get a different answer

Answer 15

20

Answer 16

so thats all i had to do

Answer 17

@Buttercup214 its 20

Answer 18

yes! if you want the speed in miles/seconds, that is all!

Answer 19

oh sorry i forgot to say thank you.