What is the perimeter of a rectangle with one side 3cm if it had a area of 21cm?

Answer 1

The perimeter is 20 cm.

Let the one side of the rectangle is #=a# Let the other side of the rectangle is #=b# Then area #= a xx b=ab# Now -
Let #a = 3 cm# #3b=21# #b=21/3=7#
The perimeter of the rectangle #=2(a+b)=2(3+7)=2(10)=20#
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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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