How many feet of fencing is needed to fence in a 130 ft by 225 ft area?

So you just want to find the perimeter first.

Perimeter is:

2l + 2w

If l equals to length and w width.

So,

2 * 130 + 2 * 225

260 + 450

710

So the perimeter is 710 feet, so you need 710 feet to fence in a 130 ft by 225 ft area.

A) for the n row: 22+(n-1)×6therefore,b) 100-22=78that means (n-1)×6=7878÷6=1313+1=1414th row has 100 seats