Question

1 gold plate weight 30 mg if the weight of some plates is 450 ml mg find the number of plates​

Answer 1

15 plates

Explanation:

450 divided by 30 = 15, meaning 30 x 15 would be 450 mg. This also means that if the weight of some plates was 450 mg, there would be 15 plates.

Answer 2

15

Explanation:

Your units are a little confused.

The mass (total ) is 450 mg

1 plate weighs 30 mg

1 plate / 30 mg = x plates / 450 mg Cross multiply

1 * 450 = 30x Divide by 30

450 / 30 = x

x = 15

There are 15 gold plates.