Which is the longest length?

a 1 yd. 20 in.

b 1yd. 1 ft.

С

40 in.

d 3 ft.

it's A, one yard and 20 inches

Step-by-step explanation:

If you convert them all to inches, a yard and a 20 inches are equal to 56 inches, so you can rule out the 40 inches answer. a yard and a foot are equal to 48 inches, so we can rule out that also. 3 feet is equal to 36 inches, because we know that a foot is equal to 12 inches. so you are left with A. 1 yard and 20 inches.

a-1yd20in

Step-by-step explanation:

a-4ft 8in

b-4ft

c-3ft 4in

d-3ft