Question

Two circle touch each other externally
Tum sum of their area is 149πcm and the distance between their centre is 7cm find the radius of circle

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Answer 1

Answer:

MATHS

Two circles touch each other externally If the distance between their centers is 7 cm and if the diameter of one circle is 8 cm, then the diameter of the other is

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ANSWER

We have d

1

=2r

1

Herer

1

=x cm and d

1

=8 cm

Therefore, 8=2×x

⇒x=

2

8

=4 cm

⇒d

2

=2r

2

⇒r

2

=7−x=7−4=3cm

⇒d

2

=2×3=6 cm

Then the diameter of other circle is 6 cm.

Answer 2

Step-by-step explanation:

We have d =2r

Here r1 =x cm and d1 =8 cm

Therefore, 8=2×x

⇒x= 2/8=4 cm

⇒d2=2r2

⇒r2 =7−x=7−4=3cm

⇒d2 =2×3=6 cm

Then the diameter of other circle is 6 cm.