Question

The area of a rectangle is 135 square units. Its length measures 9 units. Find
the length of its diagonal. Round to the nearest tenth of a unit.

Answer 1

Answer:

Length = 9 units

Area = 135 square units

Area = Length x Breadth

135 = 9 x Breadth

Breadth = 15units

$By \ pythagorean \ theorem\\\\Diagonal ^ 2= Length^2 + Breadth^2$

               $= 9^2 + 15^2 \\= 81 + 225 \\=306$

$Diagonal = \sqrt{306} = 17.49$

Diagonal = 17.5 units