hi all,

this is a problem that requires the answer expressed as a surd. (calculator not to be used)

The sides of a rectangle are in the ratio 2:3. The diagonal is of length 26cm. Find the perimeter.

The answer given in the answer section is

sides are therefore

and perimeter

using prime factors of 1352 and 2028

using a calculator the answer i calculated is not equal to the textbooks answer