Friday
December 19, 2014

Homework Help: Maths

Posted by Ramesh Reddy on Sunday, August 21, 2011 at 12:40am.

I am very greatefull to you if you guide me to solve this problem.

Two circles touch externally. The sum of their areas is 130π cm2 and the distance between their centers is 14 cm. find the radii of the circles?

I tried to solve this problem like this:

Area of the circle = πr2

130πcm2 = 22/7xrxr
130x22/7 =22/7xrxr
22/7xr2 =130x22/7
r2 =130x22x7/7
r2 = 130x22x7/7x22
r2 =130
r =√130
r=√2x5x13.
I tried to do this in the above way. But I couldn't get the answer further.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

geometry - Two circles which are not congruent touch externally. the sum of ...
math - Two circles with radii 3cm and r cm touch each other externally. If their...
math gre question - in an infinite series of circles the radius of the second ...
mathematics - Two equal circle touch externally at point P. PX and PY are chords...
Math - Optimization Problem A right circular cylindrical can of volume 128tπ...
Geometry - Circles and tangents - Two circles of radius 1 are externally tangent...
Maths - the figure below shows 3 similar circles that just touch one another.A,...
Math...again - Two circles have circumferences of π and 3π. What is ...
Math...anyone? - Two circles have circumferences of π and 3π. What is ...
Math - Two circles C1 and C2 touch externally at A. The tangent to C1 drawn at a...

Search
Members