tolong d jwb y bsk hrs di kumpul

volume = 80 x 50 x 50
             = 200.000 cm³
             = 200 dm³

volume bocor = 200 - 50 = 150 dm³

debit air yang bocor = volume bocor / waktu
                                 = 150 / 20
                                 = 7,5 dm³ / menit