MATHEMATICS MIDDLE SCHOOL

1. Pizza Paradise delivers pizza in the local neighborhood using bicycles. The bike delivery person, Tommy, uses a bike whose wheels have a radius of 13 in. Tommy’s average biking speed is 15 mph. How many minutes would it take for Tommy to deliver a pizza to a house that is 4 mi away, and how many revolutions of his bike wheels would this take? (A revolution is one full wheel turn.) Use 3.14 to approximate pi. Round to the nearest whole number.

Answers

Answer 1
Answer: we need to find circumference of wheele

C=2pir
r=13
C=2pi13
C=26pi
aprox pi=3.14
C=81.64 in


15 miles in 1 hour
4 miles in x hour
15/1=4/x
times x both sides
15x=4
divide 15 both sides
x=0.26666666 hour
times 60 mins
x=16 minutes


how many inches is 4 miles
1miles=5280 feet
1foot=12 inches
5280 tiems 12=63360 inches

circumferenc times number of rotations=63360
81.64 times number=62260
divide both sids by 81.64
number of rotations=776.09...
round
776 rotations



16 minutes and 776 rotations 

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Hello!

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I hope it helps!

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