10 Find the missing side of a rectangle
A. Perimeter = 20 cm, L - 6 cm.
B. Perimeter - 46 cm, L12
cm
C. Perimeter = 40 cm, B = 4 cm.
D. Perimeter = 30 cm, B = 4 cm.
bars 21
Answers
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A) Breadth = 4 cm
B) Breadth = 11 cm
C) Length = 16 cm
D) Length = 11 cm
Step-by-step explanation:
A)
GIVEN
Perimeter = 20 cm
Length = 6 cm
___________________________
TO FIND
Breadth
___________________________
We know that,
Perimeter Of Rectangle = 2 × ( Length + Breadth )
20 = 2 × ( 6 + Breadth )
20 = 12 + 2B
2B = 20 - 12
2B = 8
B = 8 / 2
B = 4
Breadth = 4 cm
___________________________
B)
GIVEN
Perimeter = 46 cm
Length = 12 cm
___________________________
TO FIND
Breadth
___________________________
We know that,
Perimeter Of Rectangle = 2 × ( Length + Breadth )
46 = 2 × ( 12 + Breadth )
46 = 24 + 2B
2B = 46 - 24
2B = 22
B = 22 / 2
B = 11
Breadth = 11 cm
___________________________
C)
GIVEN
Perimeter = 40 cm
Breadth = 4 cm
___________________________
TO FIND
Breadth
___________________________
We know that,
Perimeter Of Rectangle = 2 × ( Length + Breadth )
40 = 2 × ( Length + 4 )
40 = Length + 8
2L = 40 - 8
2L = 32
L = 16
L = 16
Length = 16 cm
___________________________
D)
GIVEN
Perimeter = 30 cm
Breadth = 4 cm
___________________________
TO FIND
Breadth
___________________________
We know that,
Perimeter Of Rectangle = 2 × ( Length + Breadth )
30 = 2 × ( Length + 4 )
30 = Length + 8
2L = 30 - 8
2L = 22
L = 11
L = 11
Length = 11 cm
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