Answer:
B. 2,324 inches
Step-by-step explanation:
You need to find the circumference of the bike wheels first so that you know how much she would travel if her wheels rotated 1 time. Circumference of circle = pi × d
1 time = 20pi
37 times = 20pi × 37
= 740pi
= 2324.778564...inches
The diameter of a cartwheel is 2.1 m. Find the distance travelled when it completes 100 revolutions.
You need to find the circumference of the cartwheels first so that you know how much it would travel if her wheels revoluted 1 time. Circumference of circle = pi × d
1 revolution = 2.1pi
100 revolutions = 2.1pi × 100
= 210pi
= 659.7344573...m
The diameter of a circular park is 98 m. Find the cost of fencing it at $4 per meter.
You need to find the circumference of the park first so that you know how much it would cost. Circumference of circle = pi × d
Circumference of park = 98pi
Cost of fencing = 4 × 98pi
= 392pi
= $1231.50
≈ $1232.00
