the width of a rectangle is fixed at 12 cm. What lengths will make the perimeter greater than 98 cm.

Answer 1

Any length greater than 37 cm.

2*(37 + 12) = 98 is the perimeter if the length is 37 cm.

Answer 2

2W + 2L > 98.

2*12 + 2L > 98,
24 + 2L > 98,
2L > 98-24,
2L > 74,
L > 37.