Question

Find the area of semi circle diameter is 49cm

Answer 1

Answer:

Answer is 943.25

Step-by-step explanation:

WE have diameter of 49 cm

to get radius we need to divide diameter / 2

= 49/2 = 24.5

Area of circle = $\pi r^2$ = 22/7 *24.5^2  = 22/7 *24.5 * 24.5

                                                          =22*3.5*24.5 ( 24.5 / 7 = 3.5)

                                                          =1886.5 sqcm

Because it is semi circle area/2 =1886.5/2

                                                      = 943.25

Hope you understood

Answer 2

Answer:

Hence the value of the area of the semi-circle is $943.25\;cm^{2}$

Step-by-step explanation:

As per the data provided in the given question.

The given data is as follows,

The diameter of a circle (d) is 49 cm.

We have to find the value of the area of the semi-circle(A).

We know that the radius (r) of the semi-circle is half of the diameter (d)

$r=\frac{1}{2}d\\r=\frac{1}{2}\times49 \\r=\frac{49}{2}\\r= 24.5 cm$

Here we will use the formula of the area of the semi-circle

$A=\frac{\pi\times\\r^{2} }{2}$

Now we will substitute the value radius (r) and $\pi=\frac{22}{7}$

$A=\frac{\frac{22}{7}\times\\24.5^{2} }{2}$

We will shift 7 from numerator to denominator we get

$A=\frac{22\times24.5^{2} }{7\times2}$

$A=\frac{22\times600.25}{7\times2}$

Now we will divide 22 by 2 and 600.25 by 7

Further, we get

$A=11\times85.75\\A= 943.25\;cm^{2}$

Hence the value of the area of the semi-circle is $943.25\;cm^{2}$