Find the dimensions of the rectangle meeting the specified conditions. The perimeter is 420 centimeters and the width is 30 centimeters less than the length.

Step-by-step explanation:

perimeter = 240

L = length

w = width

240 = 2l + 2w

width = L - 30cm ( 30 cm less than length)

240cm = 2L + 2( L - 30cm)

240cm = 2L + 2L -60cm

240cm + 60cm = 2L + 2 L

300 Cm = 4L

L = 300cm ÷ 4

L = 75 cm

therefore, the length is 75 cm and width,

(L - 30cm)

= 75cm - 30cm

= 45 cm

Therefore the width is also 45cm

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.