Question

the perimeter of a rectangle is 13 cm wridth is 2³/⁴ cm find the length ​

Answer 1

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Given :

• perimeter of a rectangle is 13 cm
• wridth is 2³/⁴ cm
• length ?

Solution:

$l</p><p></p><p>=</p><p></p><p>P</p><p></p><p>2</p><p></p><p>﹣</p><p></p><p>w</p><p></p><p>=</p><p></p><p>13</p><p></p><p>2</p><p></p><p>﹣</p><p></p><p>2</p><p>$

=4.5cm

Answer 2

Answer

Length of rectangle=15/4 Or 3¾

Breadth = 2 3/4 = 2×4+3/4=11/4cm

[perimeter=2×L+B]

perimeter=2(x+11/4) [x=length]

13=2(x+11/4)

13/2=x+11/4

x+11/4=13/2

x=11/4-13/2 [ by transposing]

LCM=4

x=11/4-26/4 [13×2=26, 2×2=4]

x=15/4

converting to mixed fraction

=3¾

Length of rectangle= 3¾