Question

A heater uses 3 units of electricity in 40 minutes . How many units does it consume in 2 hours ?

Answer 1

The and. is 9 unit.

If my ANS. is right mark me as branliest.

Answer 2

The Heater will consume 9 units of electricity in 2 hours.

Given:

3 units of electricity -> 40 minutes

To Find:

Units of electricity consumed in 2hrs.

Solution:

By using a simple ratio and proportion we can get the units of electricity consumed.

We know that,

3 units of electricity are used in 40 minutes

Therefore, the electricity used per minute is = $\frac{3}{40} units$

In 2 hours there are 120 minutes.

Therefore we get,

Electricity used in 120 minutes = $\frac{3}{40} *120=3*3=9units$

Hence the total units consumed in 2 hours is 9 units.

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