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Method 1 :
2 x 2 x 2 = 8 (volume of 2-m cube)
6 x 6 x 6 = 216 (volume of 6-m cube)
216/8 = 27
27/3 = 9

Method 2 :
2 x 2 x 2 = 8 (volume of 2-m cube)
1 tap x 1 day ——- 8
3 taps x 1 day ——- 24
6 x 6 x 6 = 216 (volume of 6-m cube)
216/24 = 9

Ans : 9 days.

1 Reply 1 Like

Hi Alfretztay, thank you so much for detail explanation. 

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Hi ATM82517, you are most welcome.

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