Question

Which of the following does not have a scale factor of 1/60? (Hint: Use Unit Conversion).

1 in. = 5 ft.
1 ft = 20 yd.
1 cm = 60 cm.
1 in. = 60 ft

Answer 1

1in : 5ft
1in : (5 x 12) in
1in : 60 in

1ft : 20yd
1ft : (20 x 3) ft
1ft : 60 ft

1 cm : 60cm

1in : 60ft
1in : (60 x 12)in
1in : 720 in
Hence, 1in : 60ft does not have a scale factor of 1/60