Question

Help I will mark your as brainliest or what ever and 10 points

Answer 1

Question 20

Total Surface Area = (4 x 8) + (5 x 8) + (8 x 3) +  2(1/2 x 4 x 3)
Total Surface Area = 108 cm²

Question 21

Total Surface Area = 2 (π x 4²) + (π x (4x2) x 20 ) 
Total Surface Area = 603 cm² (Nearest whole number)

Question 22

Total Surface Area = (20 x 5) + (12 x 20) + (20 x 13) + 2 ( 1/2 x 12 x 5)
Total Surface Area = 660 In²