Question #4ee1e
2 Answers
Jan 25, 2018
The answer is 30 miles per hour.
Explanation:
Use the conversion factor "60 minutes in an hour" to convert the original speed
Hence, the answer is 30 mph.
Jan 25, 2018
Explanation:
"using the relationship"
color(red)(bar(ul(|color(white)(2/2)color(black)("distance (D)"="average speed (S)"xx"time (T)"color(white)(2/2)|)))
rArrD=ST
"from this we can obtain"
S=D/T" and "T=D/S
"here we require speed (S) so using "S=D/T
"note that time is in hours and"
40" minutes "=40/60" hour "=2/3" hour"
S=D/T=20/(2/3)=(3xx20)/2=30" miles per hour"