The diameter of a circle is 10.5 cm. Calculate the perimeter of the circle​

32.99 cm

Using the formulas

C=2πr

d=2r

C=πd=π·10.5≈32.98672cm

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.

rick would give her the best deal as he will charge $8.88 per hour