Solve.
-Linda and Dave leave simultaneously from the same starting point biking in opposite directions. Linda bikes at 5 miles per hour and Dave bikes at 9 miles per hour. How long will it be until they
Are 30 miles apart from each other?
A) $2 \frac { 1 } { 7 } \mathrm { hr }$
B) $7 \frac { 1 } { 2 } \mathrm { hr }$
C) $\frac { 7 } { 15 } \mathrm { hr }$
D) $\frac { 2 } { 3 } \mathrm { hr }$

Question

Solve.
-Linda and Dave leave simultaneously from the same starting point biking in opposite directions. Linda bikes at 5 miles per hour and Dave bikes at 9 miles per hour. How long will it be until they
Are 30 miles apart from each other? 
A) $2 \frac { 1 } { 7 } \mathrm { hr }$
B) $7 \frac { 1 } { 2 } \mathrm { hr }$
C) $\frac { 7 } { 15 } \mathrm { hr }$
D) $\frac { 2 } { 3 } \mathrm { hr }$

Quizplus · Accepted Answer

Since Linda and Dave are biking away from each other, their speeds add up. Together, they cover $5 + 9 = 14$ miles per hour. To find out how long it takes for them to be 30 miles apart, divide the distance by their combined speed: $30 \div 14 = 2 \frac{1}{7}$ hours.

Solve -Linda and Dave Leave Simultaneously from the Same Starting 217hr2 \frac { 1 } { 7 } \mathrm { hr }271​hr

Solve
-Linda and Dave Leave Simultaneously from the Same Starting $2 \frac { 1 } { 7 } \mathrm { hr }$