Please solve this both questions

Acollege is planning to construct a rectangular parking lot on land bordered on one side by a highway. the plan is to use 680 feet of fencing to fence off the other three sides. what dimensions should the lot have if the enclosed area is to be a maximum?

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

The trigonometric ratios sine and secant are reciprocals of each other