MathDB

Angelina drove at an average rate of

80

kph and then stopped

20

minutes for gas. After the stop, she drove at an average rate of

100

kph. Altogether she drove

250

km in a total trip time of

3

hours including the stop. Which equation could be used to solve for the time

t

in hours that she drove before her stop? (A)\ 80t\plus{}100(8/3\minus{}t)\equal{}250 \qquad (B)\ 80t\equal{}250 \qquad (C)\ 100t\equal{}250 \\ (D)\ 90t\equal{}250 \qquad (E)\ 80(8/3\minus{}t)\plus{}100t\equal{}250

Problem Statement