Set up an equation: 4x + 3 = 2x + 4
then solve for x
then plug x back in to the expression for R
This is a division problem.
20 divided by 1 1/4
20/(1 1/4) = 20/(5/4) = 20/1 * 4/5 = 80/5 = 16
There are 16 cans.
They would need to cut each cupcake into 4 pieces.
The area of the water well is 
<h3>How to determine the area?</h3>
The radius is given as:
Radius, R = 2r
The area of the water well is calculated using:

This gives

Evaluate the expression

Hence, the area of the water well is 
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The smallest is 31,000; the largest is 56,000. A "typical" stadium might hold about 43,000 spectators.