Answer: length=25 width=5
Explanation:
let L= length
let W= width
length is 5 times as long as the width means; L=5*W=5W
perimeter of rectangle; 60= L+L+W+W=2L+2W
substituting L we have; 60=2*5W+2W=10W+2W=12W
therefor 60=12W
60/12=12W/12
W=5
remember; L=5W=5*5=25