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Question
Arona cut a cake into two halves and cut one half into smaller pieces of equal size. Each of the small pieces is twenty grams in weight. If she has seven pieces of the cake in all with her, how heavy was the original cake?
Arona cut a cake into two halves and cut one half into smaller pieces of equal size. Each of the small pieces is twenty grams in weight. If she has seven pieces of the cake in all with her, how heavy was the original cake?
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Solution
The correct option is C 240 grams
Seven pieces of cakes means one half cake and six pieces of another half cake.
Total weight of 6 small pieces = 6 x 20 g
= 120 g.
∴ Weight of the half cake = 120 g.
Total weight of the cake = 240 g.
Seven pieces of cakes means one half cake and six pieces of another half cake.
Total weight of 6 small pieces = 6 x 20 g
= 120 g.
∴ Weight of the half cake = 120 g.
Total weight of the cake = 240 g.
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