#### Answer

A piece of $\frac{1}{4}$-inch flat steel 1.45 ft long by 4.2 ft wide will remain.

#### Work Step by Step

Find the total length that was cut off.
$2.4+2.4=4.8$
Subtract the amount that was cut off from the original length to find the remaining length.
$6.25-4.8=1.45$