The sum of the radii of two circles is 84 cm and the difference of their areas is 5544 cm?
Calculate the radii of the two circles.
Answers
Answered by
1
Step-by-step explanation:
The sum of the radii of two circles is 84 cm and the difference of their areas is 5544 cm?
Calculate the radii of the two circles.
Answer: 52.5 CM, 31.5 cm
Answered by
5
Step-by-step explanation:
r1+r2=84cm=>r1=84-r2
(πr1²)-(πr2)²=5544cm²
π(r1²-r2²)=5544
22/7[(84-r2)²-r2²]=5544
22/7(7056-168r2)=5544
22/7x56(126-3r2)=5544
r2=31.5cm
from r1+r2=84cm
r1=52.5cm
radii of two circles are 52.5cm and 31.5cm
Similar questions