2. The perimeter of a rectangle is 28 cm
and its area es 48cm². Consider the length
as x and breadth as y?
(a) find the value of x+y and xy?
(b) find the value of x-y?
© What are the length and breadth of the rectangle?
Answers
Answer:
ok The circumference of a circle is 2πr or πD if diameter is given.
The answer is 25.13 cm
Step-by-step explanation:
Now method 1:
C=2πr
So finding for radius in this equation=diameter/2
8/2=4 cm
So now 2 × 22/7 × 4
176/7=25.13 cm
OR
C=πD
22/7 × 8
176/7=25.13 cm
Step-by-step explanation:
Given,
Breadth=y
Length=x
Perimeter =28cm
Area=48cm^2
(a)We know that,
Perimeter of a rectangle =2(l+b)
=>28=2(x+y)
=>x+y=28/2
=>x+y=14
We know that.
Area of a rectangle =l×b
=>48=xy
=>xy=48
(b)Breadth =Area/Length
=>y=48/x
Length =Area/Breadth
=>x=48/y
A/Q
x-y=48/y - 48/x
=48x-48y/xy We took xy as L.C.M.
=48(x -y)/xy
=48(x-y)/48 We found out that xy=48,So I replaced xy with 48
=x-y The denominator 48 and the numerator 48 got cancelled
(c)Breadth =Area/Length
=>y=48/x
Length =Area/Breadth
=>x=48/y
Hope you understand
And I am not sure about the answer of (b)
Plzz mark me a brainliest