Question

A rectangle with diagonal of length 20 CM has sides in the ratio 2:1. Find the area of rectangle. ​

Answer 1

Let the length =2x

and breath = 1x

diagonal = 20cm

20² = (2x)² + (1x)²     [ by Pythagoras theorem ]

400 = 4x² + 1x²

400 = 5x²

x² = 400/5

x² = 80

x =√80

x = √2×2×2×2×5

x = 4√5

∴length =2x = 2×4√5 = 8√5

  breath = 1x= 4√5

∴ area of a rectangle = l×b

                                 = 8√5 × 4√5

                                    =32 ×5

                                    = 160

HOPE IT HELPS

Answer 2

Hey buddy !

Here is your answer hope it would help