I need help with My math problem!?

Question

A microwave oven uses 1.5 KWand Hour of electricity in 15 min. How much electricity does it use in 2 hours?

Answer 1

(1.5kW /hr / 0.25hr) x 2hr = 12kWh

Answer 2

yeah. what everyone else said

Answer 3

This question is a simple ratio problem.

First convert minutes into hours or hours into minutes. Converting minutes to hours lets us work with smaller numbers.

15 minutes = 1/4 hour = 0.25 hour

Set up a ratio:

1.5 / 0.25 = x / 2

Cross multiply:

0.25 * x = 1.5 * 2

x = 1.5 * 2 / 0.25

x = 12

Therefore, the microwave oven uses 1.5 kW hr in 2 hours.

Answer 4

You divide 15 into the 2 hours then you multiply that number by the 1.5KW and that will be your answer.

Answer 5

What is "1.5 KWand Hour"

if you mean 1.5 kW/hr, that is meaningless.

I'll assume you mean 1.5 kW-hr.

if it uses 1.5 kW-hr in 15 min, then it uses 8 times as much in 2 hours, or 12 kW-hrs.

By the way, that means the microwave is rated at 6 kW.

Answer 6

There is no such thing as kilowatts per hour.

It's like saying (of a car) mph per week.