A gardener is installing a circular garden. The radius of the circle 28 feet. He needs to know the circumference in order to buy materials for the edging. What is the circumference if he uses = 22/7.

The circumference is ?

3 answers

A contractor is pouring a concrete driveway. The perimeter is 108 ft. What length will the driveway be if the width is 12 ft.?

How many feet is the Drive Way?
C = 2 pi r = (44/7) 28 = 176

2L + 2b = 108
L + b = 54
L = 54 - 12 = 42
A circle has a diameter of 10 centimeters.

What is the best approximation of its area?

Use 3.14 to approximate for π .

15.7 cm²

31.4 cm²

78.5 cm²

314 cm²