Question

(5) If the area of the circle of radius 10 cm
is equal to the area of parallelogram of
base 31.4 cm then its height is
(A) 31.4 cm
(B) 12 cm
(C) 10 cm
(D) cannot be determined​

Answer 1

Step-by-step explanation:

Given radius of circle is 10 cm

So let us find the area

$\begin{gathered} = > area \: of \: circle = \pi \: r ^{2} \\ \\ = > 3.14 \times 100 \\ \\ = > area = 134cm ^{2} \end{gathered}$

=>areaofcircle=πr2

=>3.14×100

=>area=134cm2

Given area of circle = area if parallelogram

And the base of the parallelogram is 31.4cm

So we know that area of parellelogram is given by the formula

area = length \times breadtharea=length×breadth

So A/Q

$\begin{gathered} = > length \times 31.4 = 134 \\ \\ = > length = \frac{134}{31.4} \\ \\ = > length = \frac{1340}{314} \\ \\ = > \boxed{length = 4.2cm}\end{gathered}$

=>length×31.4=134

=>length= 31.4 134

=>length= 314 1340

=> length=4.2cm

Answer 2

Answer:

$\huge \mathfrak \colorbox{yellow}{ANSWER}$

(c) 10 cm