Answer:
unit rate = 2.57 blocks / min
Time = 19.444 ...
Explanation:
The unit rate is how far she can travel in 1 minute.
Rate is defined as distance / time
Givens
distance = 18 blocks
time = 7 minutes
Solution
rate(r) = distance(d) / time(t)
r = 18 blocks / 7 minutes
r = 2.57143 blocks / minute
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Set up the ratio for 50 blocks
1 minute / 2.57143 blocks = x / 50 blocks Multiply both sides by 50
1 * 50 / 2.57143 = x * 50 / 50
x = 50 / 2.57143
x = 19.4444...