Maths 的功課 (F.1 - F.2)

2008-08-30 10:27 pm

1. The figure shows a prism whose base is a parallelogram.
It the total surface area is 3284cm^2,
find its volume.

2. The bigger square in the figure is made up of4identical rectangles and a smaller squares are 49 cm^2 and 4cm^2.
Find the width of one rectanfle.

3. How many pairs of rabbitswill there be after 6 months,if each pair produces a new pair each month,and each new pair bedins to bear young two months after its own birth?

回答 (1)

[匿名]

2008-08-30 11:37 pm

✔ 最佳答案

Question 1 and 2 no figure can be seen.

Q3
Case 1
Parent rabbits keep giving birth to rabbits in the 6 month, thus, 12 extra rabbit produced

Case 2
The first pair of rabbits produced start give birth to baby at 3rd month, 8 extra baby produced

Case 3
The second pair of rabbits produced start give birth to baby at 4th month, 6 extra baby produced

Case 4
The third pair of rabbits produced start give birth to baby at 5th month, 4 extra baby produced

Case 5
The forth pair of rabbits produced start give birth to baby at 6th month, 2 extra baby produced

Therefore, number of rabbits
= 2 (Initial 2 parents) + 12 + 8 + 6 + 4 + 2
= 34

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