Answer:
183.6
Step-by-step explanation:
51÷5=10.2 10.2×18=183.6
If each garden takes 20 minutes to clean, it will take him (20 x 4) to clean the gardens.
20 x 4 = 100
80 minutes
or 1 hour and 10 minutes.
The average of pi is 3.14 and is an irrational #
