Ineed more math , the! cement truck a can pour 200 cubic ft of concrete in 20 minutes. it only takes truck b 15 minutes to do the same job. if they both work together, how long will it take them to pour the 200 cubic feet? i need setting up the problem and solving it, you!

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)