Worker transport

1 x 1 = 2

1 + 1 = 2

1 + 1 = 1

1

1

1 x 1 = 2

1 x 1 = 2

1 + 1 = 1

1 x 1

1 x 1

1 x 1

10/24 x 1 = 10/24

1/24 h

10/24 + 10/24 = 20/24

1 x 1 = 1 tandem

1 x 1 = 1 tandem

1 x 1 = 1 tandem

1 x 1 = 1 tandem

10/24 x 1 (tandem) = 10/24

10/24 x 1 (tandem) = 10/24

10/24 x 1 (tandem) = 10/24

10/24 x 1 (tandem) ??? = 18 (21)/24 ???