英文數學題!!!!!!!!!!!!!!

Ching

2011-08-09 7:11 pm

唔好只寫答案,MUST寫式
The right figure shows a rectangular chocolate wafer with chocolate centre and biscuit coating above and below . The dimension of each layer is shown in the figure.

由於我唔識畫,只好寫出來!!!!!!!!!!!

0.4cm :biscuit
0.2cm :chocolate
0.4cm :biscuit
長 :6cm
闊 :3cm

If there is 1m(3次方)of chocolate , how many wafers can be made at most？

回答 (1)

學問

2011-08-10 7:05 pm

✔ 最佳答案

題目係要計長方體體積啦

rectangular 係長方體，體積係長x闊x高

因為而家有 1立方米朱古力，所以我地計左一塊餅乾要幾多朱古力先~

0.2 cm x 6 cm x 3 cm = 3.6 cm^3

要留意千祈唔好用 1 除 3.6 就算，因為單位唔同。

1 m = 100 cm => 1m^3 = 100 cm x 100 cm x 100cm = 1000000cm^3 (6個零)

所以整到咁多塊: 1000000/3.6 = 277777.777....

咁你諗下而家係咪應該四捨五入呢?

就梗係唔係啦，因為唔夠材料無得整半塊架麻! 偷工減料咩!

所以答案係 277777 pieces

條式係 1 m^3 / (0.2 cm x 6 cm x 3 cm)
= 1000000cm^3 / 3.6 cm^3
= 277777.777....

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