Question

At your school, the building is 20 feet tall, a tree's height is 252 inches, and the flagpole is 6 yards high.

Which of the three objects casts the longest shadow?

Answer 1

Change all of the measurements to feet.

1 foot = 12 inches
1 yard = 3 feet

I'll be glad to check your answer.

Answer 2

1 ft = 12 in

1 yd = 36 in

Buildin tall:

20 ft = 12 * 20 = 240 in

A tree's height:

252 in = 252 in

Flagpole high:

6 yd = 6 * 36 = 216 in