Question

Find the breadth of a rectangle whose length is 8 cm and perimeter is 30 cm.

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Answer 1

Answer:

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Step-by-step explanation:

Perimeter = 200cm

Length = 70cm

P=2(l+b) P=2l+2b

200=2×70+2b

∴2b=200−140

∴2b=60

b=30

Breadth = 30cm

Answer 2

Step-by-step explanation:

2(l+b)=30

2(8+b)=30

8+b=30÷2

8+b=15

b=15-8

b=7cm.