20 people are there. Each eat 4 slices of pizza.
Each pizza contains 8 slices.
By forming it as an equation,
20(4) = 8(x pizza)
No of pizzas to be ordered = 10
To solve this, you first subtract 60 by 18 to get 42
You then divide this by 2 to get 21
So, it'll take 21 minutes
40min*1.05=42min they spent 42 min together
ps: check the multiplication it's 01:30 and I did that in head
The surface area is ≈ 451.92
