Ans 1:
Class : Class 9
66 plus 82 is 148 and only 120 bags are there so 148 minus 120 , 28 red haversacks will be there
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Ans 4:
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