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Subject :IMO    Class : Class 9

star.eps Arpan cut a cake in two equal parts and one of these two pieces is again cut into equal parts. Each small part is of 20 grams. If there are seven parts of the whole cake, what was the weight of the original cake ?

(A) 140 grams

(B) 280 grams

(C) 240 grams

(D) 300 grams
Please explain

Ans 1:

Class : Class 9
The seven pieces consist of 6 smaller equal pieces and one half cake piece. Weight of each small piece = 20 g. So, total weight of the cake = [2 x (20 x6)]g= 240 g.

Ans 2:

Class : Class 10
240 grams

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