Answer: 8 min
Explanation:
Use the formula distance = rate x time
Ursula:
- distance = d
- rate = 60,
- time = t - 1 (she gave Andre a 1 minute head start)
d = 60(t - 1)
d = 60t - 60
Andre:
- distance = d
- rate = 48
- time = t + 1 (48 meters/48 meters per min = 1 minute longer than Ursula)
d = 48(t + 1)
d = 48t + 48
Solve the system of equations using Substitution
d = 60t - 60
d = 48t + 48
60t - 60 = 48t + 48
12t - 60 = 48
12t = 108
t = 9
Ursula's time was "t - 1" ---> 9 - 1 = 8