Question

A plumber pays $3.60 for 60 centimeters of pipe.Explain how the plumber can use unit cost of the pipe to find the cost of buying 100 meters of the sis me kind of pipe. Show the calculations the plumber needs to make?

Answer 1

3.60 / 60cm = .06/cm or 6 cents per centimeter
100cm = 1m
$.06 * 100cm = $6.00 / m
100m = 100 * $6.00
= $600

Answer 2

cost of 100 meters of the pipe = $600

Explanation:

The plumber bought a pipe of 60 centimeter for $3.60 . The cost of 1 cm of that pipe can be evaluated as

cost of 1 cm pipe = 3.60/60

cost of 1 cm pipe = = $ 0.06

The plumber wants to buy the same pipe but a length of 100 meters . Since we know the price of the pipe per centimeter, we have to convert the meter to centimeter.

1 m = 100 cm

100 m = 10000 cm

Since 1 cm cost $ 0.06

10000 cm will cost ?

cost of 10000 cm of the pipe = 10000 × 0.06

cost of 10000 cm(100 meters) of the pipe = $600