The area of a square is 49cm^2. The perimeter of the square is equal to the circumference of a circle. Work out the radius of the circle. Give your answer to 1 decimal place.
Area of a square (As) = Side length (L)2
L = square root As
L = square root 49
L = 7 cm
Perimeter (P) = 4L
P = 4 x 7
P = 28 cm
P = Circumference (C)
C = 28 cm
C = 2pi x Radius (r)
r = C / (2pi)
r = 28 / (2pi)
r = 4.45...
r = 4.5 (1 d.p.)
WD
Related Maths GCSE answers
All answers ▸Expand the following brackets: (2x + 1)(x + 3)
x^2 - x - 90 = 0. Solve to find x.
Yesterday it took 5 cleaners 4 and ½ hours to clean all the rooms in a hotel. There are only 3 cleaners to clean all the rooms in the hotel today. How much time will it take them?
Expand and Simplify: 6(2x+3) -x(3+(1/x))