Question

21 dan 22 pakai cara yaaaa

Answer 1

1.) 
L1 = 1/2 * phi * r * r
    = 1/2 * 22/7 * 7 * 7
    = 77
L2 = (p * l) - (1/4 * phi * r * r)
    = (30 * 14) - (1/4 * 22/7 * 7 * 7)
    = 420 - 38.5
    = 381.5
L3 = (phi * r * r) - ( 1/4 * phi * r * r)
    = (22/7 * 7 * 7) - (1/4 * 22/7 * 7 * 7)
    = 154 - 38.5
    = 115.5
L1+L2+L3 = 77 + 381.5 + 115.5 = 574

2.)
L= (s * s) - (phi * r * r)
  = (14 * 14) - (22/7 * 7 * 7)
  = 196 - 154 
  = 42