tolong jawab utk b,c,d,f beserta caranya

C. L = (35 x 35) + (22/7 x 35² : 4)
L = (1225 + 962,5)
L = 2187,5 cm²
D. L = (20 x 10) - (10 x 10 : 2) + (¾ x 3,14 x 10²) =
L = 200 - 50 + 235,5
L = 485,5 cm²
E. L = (22/7 x 28²) - (22/7 x 14²)
L = 2464 - 616
L = 1848 cm²
D. L = (22/7 x 42² : 2) - (22/7 x 14² : 2)
L = 2772 - 308
L = 2464 cm²