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The sum of the diameters of two circles is 2.8 m and their difference of circumferences is 0.88m. Find the radii of the two circles (Ans: 77, 63)
Ans: d1 + d2 = 2.8 m= 280cm
r1+r2 = 140
2 Π (r1 - r2) = 0.88m = 88cm
r1 - r2 =88/2Π = 88x7/44 = 2 x 7 = 14
r1-r2 = 14
2r1 = 154 r1=77
r2 = 140 - 77 = 63
r1 = 77 cm, r2= 63cm
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