Question

lake Test: HW Quiz 182 s Question Completion Status: QUESTION 12 The radius of a large drill bit is 0.750 cm. What would be the area of the hole it drills? O A 0.075 cm2 O B. 1,.17 cm2 OC.1,5 cm2 O D. 1.77 cm2 QUESTION 13 How thick could the cement be to pour a new patio 15.50 m x 17.50 m if the contractor provided 50.0 m3 of cement? OA 18.4 m B. 18.4 cm OC. 2.86 m D 3.22 m E. 3.22 cm

Answer 1

Area of hole is A = pi r^2 A = 3.14 times (0.75 times 10^-2)^2 m^2 = > A = 1.77 cm^2 (D) Since volume V = l times b times t [t is thickness] 50 = 15.5 times 17.5 times t t = 50/15.5 times 17.5 m = > t = 0.184 m or t = 18.4 cm (B)