Question

A plumber charged $18 for 15 minutes of work. If the plumbers fees remain at a constant rate, how much would the plumber charge for 1 hour of work?

Answer 1

He’d charge $72 for an hour of work. Because, 60 minutes (1 hr.) divided by 15 = 4, so the price for 15 mins.*$18=$72

Answer 2

$72 ($18 x 4 (1 hour = 4 x 15)