Subject :IMO Class : Class 3
Subject :IMO Class : Class 6
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Subject :IMO Class : Class 5
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Subject :IMO Class : Class 4
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Subject :IMO Class : Class 6
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Subject :IMO Class : Class 7
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Subject :IMO Class : Class 7
Ans 7:
Class : Class 8
Answer is (C)Diameter of bigger circle=28 cmradius=28/2=14 cmArea of semicircle=1/2*22/7*14*14=4312/14=308 sq.cm2 semicircle=circleArea=22/7*7*7=1078/7=154 sq.cmArea left=308-154=154 cm
Ans 8:
Class : Class 8
c is correct308-154=154 you have done this308 154=462hence option c is correct
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Subject :IMO Class : Class 8
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Subject :IMO Class : Class 7
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Subject :IMO Class : Class 10
Ans 2:
Class : Class 10
Answer is 3abc cause'.
Centroid in coordinate geometry is equal tO X1+X2+X3/2 , Y1+Y2+Y3/2
THEREFORE 0 EQUAL TO X CORDINATE ANT SO A+B+C EQUAL TO ZERO