Power, Voltage and Current - Hairdryer Problem

[skibum143]

Homework Statement

A typical household circuit is capable of carrying 30.0 A of current at 120 V before the circuit breaker will trip. How many 1500-W hair dryers can run off one such circuit?

Use the relation between power, current and voltage. Also, remember hair dryers come in integer units.

Homework Equations

P = VI

The Attempt at a Solution

P = 120 * 30 = 3600
3600/1500 = 2.4

This is incorrect and I don't understand why. Am I missing something?

 

[vela]

What's 0.4 of a hairdryer?

 

[skibum143]

Ah, thank you. I only put 2.4 because they said "Also, remember hair dryers come in integer units" so I thought they wanted the .4.

Thank you!