Problema Solution
Suppose I am walking from school at 3 miles per hour and start at 12:00. At 12:30, you start riding your bike at 18 miles per hour to find me. At what time do you find me?
Answer provided by our tutors
he answer is
"You find me at _______"
Let
t = the time after 12:00
We use the formula
distance = rate times time
Then my distance from school is
3t
To find your distance from school, multiply the rate, 18 by the time since you left, t - 1/2.
18 (t - 1/2)
We set the two equal to each other:
3t = 18(t - 1/2)
3t = 18t - 9 distributing through
-15t = -9 subtracting 18t from both sides
t = 9/15 = 3/5 = 36/60 or 36 minutes. dividing both sides by -15
Hence you find me at 12:36.