kak batuk aku mengerjakan pr ku kak.

55. 1,5 km² x 10.000 = 15.000 are
      45 ha x 100 = 4500 are
      37,5 x 100 = 3750 are

Perusahaan C = 15.000 - 4500 - 3750
                        = a. 6750 are

56. Jarak = kecepatan x waktu
                = 60 x 3 1/2 (7/2)
                = c. 210 km

57. Keliling lingkaran = πd = 22/7 x 28
                                           = b. 88 cm