1/8part of a pencil is black,1/2 part of a pencil is white. if the remaining part is blue and length of this blue part is 7/2 cm. find the length of the pencil
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Length of the pencil = Amount remained/ Part remained
= 7/2/[1-(1/8+1/2(1-1/8))]
= 7/2/7/16
= 16/2 = 8 cm
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