How far did Logan throw the ball in feet?

Question

Logan threw the ball 18 inches less than Claire. Claire threw it 2 1/2 ft farther than Juan. Juan threw the ball 21 yards. How far did Logan throw the ball?

Answer 1

Here's what we know:

L = c - 18 in

c = j + 2.5 ft

j = 21 yd

1 yd = 3 ft

1 ft = 12 in

 

Now let's start solving:

c = 21yd * ^{3 ft}/_yd + 2.5 ft

c = 63 ft + 2.5 ft

c = 65.5 ft

 

L = 65.5 ft - 18 in * ^{1 ft}/_{12 in}

L = 65.5 ft - 1.5 ft

L = 64 ft

 

So Logan threw the ball 64 ft