Question

If length of rectangle is 16cm and perimeter is 42cm. What is the breadth?
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Answer 1

Answer:

Step-by-step explanation:

P = 42, l = 16

As we know that

Perimeter of Rectangle (P) = 2 * (length + breadth)

ie. P = 2*(l+b)

=> 42 = 2 * (16 + b)

=> 42 / 2 = [2*(16 + b)]/2 (Divide both side by 2)

=> 21 = 16 + b

=> 21 - 16 = 16 - 16 + b (Subtract 16 from both side)

=> 5 = b

=> b = 5cm

The breadth is 5cm.

Answer 2

Answer:

$primeter \: of \: rectangle \: = 2(l + b)$

$42 = 2(16 + b)$

$42 = 32 + 2b$

$b = 5$