Triangle KLM represents a section of a park set aside for picnic tables. The picnic area will take up approximately 400 square yards in the park.

Triangle K L M is shown. The length of K M is 45 yards and the length of L M is 20 yards. Angle L K M is 25 degrees.

Trigonometric area formula: Area = One-half a b sine (C)

To the nearest yard, what amount of fencing is needed to surround the perimeter of the picnic area?