help@askiitians.com

+91-87964 74404

Grade 10AIIMS MBBS

in the adjoining figure the area enclosed between the concentric circles is 770 cm2 if the radius of the outer circle is 21 cm calculate the radius of inner. circle

jahanavi singh

9 Years agoGrade 10

3 Answers

Vasanth SR

8 Years ago

Please enclose the proper supporting document

Subhiksha

8 Years ago

Given :

Radius of outer circle = 21cm.

Area between inner & outer circle = 770cm^2.

Area of outer circle = $\prod$ r²

= 22/7 x 21²

= 1386cm².

Area of innercircle = 1386-770

= 616cm².

$\prod$ r²= 616

r²= 616 x 7/22

r = 14cm.

Therefore radius of innercircle = 14cm.

amisha

8 Years ago

here we have

the radius of outer circle= 21cm

area between the concentric circle =770²

$\prod$ R^{2 = 22/7*21*21}

=1386cm

$\prod$ r²=1386cm -770cm

= 616cm

so,

radius of inner circle

$\prod$ r² = 22/7*r²

616 =22/7*r²

616*7/22 = r²

196 = r²

14² = r²

14 = r

hence radius = 14 cm

most scoring topics for neet?for all the subjects : chemisrtry,biology and physics

aiims mbbs

1 Answer Available

Last Activity: 3 Years ago

Consider the situation shown in figure. The strings are massless and pulley is fixed and frictionless. The speed of 3 kg mass just before touching the ground is (g = 10 m s-²)

aiims mbbs

1 Answer Available

Last Activity: 4 Years ago

Hi! My son would be taking his exam in May 2022. We need some counseling as to how to go about it as an NRI?

aiims mbbs

1 Answer Available

Last Activity: 4 Years ago

I am not diagnosed with Schizoaffective disorder. I am recently diagnosed with Bipolar 1 disorder (most recent or current manic) along with the symptoms of grandiose delusions (According to the psychiatrist, I believe myself I am God). I am not diagnosed with schizoaffective disorder but I had taken Olanzapine (increased to 5 mg dosage) and this drug is used to treat Schizophrenia but as prescribed by Psychiatrist, I was taking Olanzapine not for Schizoaffective disorder but for Bipolar disorder along with delusions. Another Psychiatrist from Lybrate platform told me that, "you might be suffering from schizoaffective disorder, and it requires immediate action of a doctor. Consult a psychiatrist as soon as possible." So, does this mean that I am diagnosed with Schizoaffective disorder or suffering from Schizoaffective disorder? If I really have Schizoaffective disorder, then who will marry me? It's better to commit Suicide as Schizoaffective disorder is the most critical psychological disorder. Does the psychiatrist indirectly told me that I am having Schizoaffective disorder in the form of Bipolar 1 disorder along with grandiose delusions symptoms?

aiims mbbs

1 Answer Available

Last Activity: 4 Years ago

100 ml of gaseous hydrocarbon consumes 300 ml of oxygen for complete combustion. the hydrocarbon is

aiims mbbs

0 Answer Available

Last Activity: 4 Years ago

View all Questions