Question

Area of circle is 3850 cm2 and an arc subtends right angle at its centre then find length of arc​

Answer 1

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As 3850 cm square is the area of circle

then,

22/7×radius square = 3850 cm square

radius square=3850×7/22 cm square

radius square =175×7cm square

radius square =1225cm square

radius=square root of 1225cm square

radius=35cm

now,

circumference of circle is 2×22/7×radius

c=44/7×35

circumference is 220 cm.

HOPE IT WILL HELP YOU...

Answer 2

55 cm

Step-by-step explanation:

πr^2 = 3850 => r^2 = 7× 3850/22

r = 35 cm

arc length (l) = r × thita × π/180

=35 × 90 × π/180

= 35/2 × 22/7 = 55 cm