Question

What is the length of a rectangle with perimeter 5.1 cm and width 1.5 cm?

Answer 1

Answer:

Rectangle

Solve for 

length

l

≈

1.05

cm

w

Width

cm

P

Perimeter

cm

Answer 2

Answer:

$\huge {\mathscr {\red {\boxed {Given:}}}}$

Width (or Breadth) of rectangle = 1.5cm

Perimeter = 5.1cm

$\huge {\mathscr {\green {\boxed {Solution:}}}}$

Formula for Perimeter of Rectangle

$\huge {P=2(l + b)}$

Where,

l = Length

b = Breadth

P = Perimeter

Now, on replacing l, b, and P with given values.

$\large{5.1 = 2(1.5 + b)}$

= $\large{5.1 = 3 + 2b}$

= $\large{2.1 = 2b}$

= $\large{\frac{2.1}{2} = b}$

= $\large{\frac{21}{20} = b}$

= $\large{1.05 = b}$

Thus, length of the rectangle is 1.05cm.

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