Class 10R sat a test the mean mark for the class is 70% there are 30 students in that class 20 of whom are boys the mean mark for the boys is 62% find out the mean for the girls

answer: the answer is 35%

34.5 cm

step-by-step explanation:

generally for a circular segment of angle, θ° and radius r

arc length

= (θ/360) x circumference

= (θ/360) x 2πr

in our case, θ = 60°, π=3.142 and r = 33 cm

substitute into above formula

arc length

= (60/360) x 2(3.142)( 33) = 34.5 cm