the circumference of two concentric circle are 121 cm and 154 cm. calculate the difference between their redii
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circumference of circle is :-2πR (π=3.14 or 22/7)
circumference of circle 1= 121 cm
so,R=121×7/22×1/2
R=11×7/2×1/2
R=11×7/4
R=77/4
R=19.25 cm
WE SHOULD APPLY SAME METHOD AS IN CIRCLE 1 TO CIRCLE 2, AND SUBTRACT THE RADIUS OF CIRCLE 1 FROM CIRCLE 2 AND EWILL GET THE DIFFERENCE IN RADII.
circumference of circle 1= 121 cm
so,R=121×7/22×1/2
R=11×7/2×1/2
R=11×7/4
R=77/4
R=19.25 cm
WE SHOULD APPLY SAME METHOD AS IN CIRCLE 1 TO CIRCLE 2, AND SUBTRACT THE RADIUS OF CIRCLE 1 FROM CIRCLE 2 AND EWILL GET THE DIFFERENCE IN RADII.
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