1.

the sides of a rectangle are in the ratio 5:4 and it's perimeter is 90 CM. find its length and breadth.

Answer»
\large \tt AHOY!! \:

ATQ, the sides of the rectangle are in ratio 5 : 4 and it's perimeter is 90cm.

let it's length be 5X and breadth be 4X

the formula for the perimeter of the rectangle is 2 ( l + b )

so here we will simply put 5x in place of "l" (length) and 4x in place of "b" (breadth)

on solving we get,

=> 2 ( 5x + 4x ) = 90cm

=> 9x = 90/2

=> 9x = 45cm

=> x = 45/9

=> x = 5cm

hence, it's length = 5x = 5 × 5 = 25cm and breadth = 4x = 4 × 5 = 20cm

\large \tt HOPE \: THIS \: HELPS!!


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