Question

cal replaces a tire after exactly 24 000km of wear. what is the fewest number of tires that he will need in order to drive 78 000km?

Answer 1

Answer:

  12

Step-by-step explanation:

You want to know the number of replacement tires needed to drive 78000 km if tires are replaced after 24000 km.

Assumptions

We assume the vehicle has 4 tires, and Cal does not have to order tires for driving the first 24000 km.

Replacements

Cal will need 4 tires when the vehicle reaches 24000 km, 4 more at 48000 km, and 4 more at 72000 km. The final set will last until 96000 km.

Cal will need to order 4+4+4 = 12 replacement tires.