Subject :IMO Class : Class 7
In the given figure, the area (in square centimetres) of the shaded portion is
A308
B462
C154
D150
Ans 1:
Class : Class 10
Ans 2:
Class : Class 7
option a
Ans 3:
Class : Class 8
the correct answer is B.
there are two small semicircles that form one circle when joined. so after joining it forms 1 circle with a diameter of 14 which means it has a radius of 7.
area= 7*7*(22/7)= 154
in the big semicircle it has a diameter of 28 which means it has a radius of 14.
area = (14*14*22)/(7*2) = 616
area of shaded part = 616-154= 462
thus the correct option is B
Ans 4:
Class : Class 7
yes it should be 154