Question

plzzz ans......CIRCLE.....MENSURATION........QUESTION 7 PLZZ BOTH (A)&(B) PARTS PLZZZ ANS BOTH PARTS

Answer 1

I)
construction: join A to B
area of shaded portion(a) =(22/7*(AO*AO))/2
or,616=44/7(AO2)
or,(616*7)/44=AO2
or, AO=(98)root
or,AO =9.9 or 10 approx
so
AC=2*AO
=2*10
=20 cm
C=22/7*10=31.4cm
II)
diameter(d)=16 Cm
radius (r)=8 cm
area of shaded part (a)=(3.14*8*8)/2
=(6.28*64)/2
= 201 cm sq.(approx)
circumference(c)=3.14*8
= 25 Cm sq.(approx)