Petra can make 8 costumes with 12 yards of fabric
<h3><u>Solution:</u></h3>
Given that Petra was given 12 yards of fabric to make costumes for the school play
Each costume requires yards
<em><u>To find: number of costume Petra can make</u></em>
The number of costume Petra can make is calculated by dividing the total fabric she has by fabric needed for one costume
Total fabric she has = 12 yards
Fabric needed for 1 costume = yards
Therefore,
Thus petra can make 8 costumes with 12 yards of fabric
it's 18 with a remainder of 13. I attached a photo that shows the work of it
Volume of a pyramid is calculated by L×W×H÷3. Which means 81× 10× 10 ÷ 3
81 × 10 × 10 = 8100 ÷ 3
So the answer is 2700.