What is the radius and diameter of a 3 m road in a circular garden? What is the perimeter and area?

What is the radius and diameter of a 3 m road in a circular garden? What is the perimeter and area?

Radius of road = radius of garden + 3
Road diameter = (garden radius + 3) × 2
Perimeter of the road = (garden radius + 3) × 2 × π
Area of road = (garden radius + 3) &# 178; × π