1a:把水80升注入長40cm,闊40cm,高80cm的水族箱,水的高度是多少cm?
1b:如果要把水族箱載滿水,還要注入水多少升?
2:果汁盒長9cm,7cm,果汁的高度是10cm,加入126cm^3,果汁會上升多少cm?
3:食物盒長10cm,闊15cm,裹面有雞湯1.2L,小琳再加入1.5L清水後,剛好注滿食物盒,食物盒的高度是多少cm?
體積!!!!!!!!!!!!
2008-01-08 6:17 am
回答 (4)
2008-01-08 6:32 am
✔ 最佳答案
1a. area = 40cm x 40cm = 1600cm^2
1L = 1000cc = 1000cm^3, 80L = 80 x 1000cm^3 = 80000cm^3
thus, height = 80000 / 1600 =50cm
1b. remind height = 80cm - 50cm = 30cm
thus, volume = 30 x 40 x 40 =48000cm^3
thus, 48000cm^3 = 48L water
2. area = 9cm x 7cm = 63cm^2
height raised : 123cm^3 / 63cm^2 =1.9524cm
3. area = 10cm x 15cm = 150cm^2
total volume = 1.2L + 1.5L = 2.7L = 2.7 X 1000cm^3 =2700cm^3
thus, height = 2700cm^3 / 150cm^2 = 18cm
2008-01-10 6:08 am
1a.
水的高度是:
80x1000/(40x40)
=80000/1600
=50(cm)
1b.
(80-50)x40x40/1000
=30x40x40/1000
=48000/1000
=48(升)
2.
果汁會上升:
126/(9x7)
126/63
=2(cm)
3.
食物盒的高度是:
(1.2+1.5)x1000/(10x15)
=2700/150
=18(cm)
水的高度是:
80x1000/(40x40)
=80000/1600
=50(cm)
1b.
(80-50)x40x40/1000
=30x40x40/1000
=48000/1000
=48(升)
2.
果汁會上升:
126/(9x7)
126/63
=2(cm)
3.
食物盒的高度是:
(1.2+1.5)x1000/(10x15)
=2700/150
=18(cm)
參考: me
2008-01-08 7:38 pm
1a. [1L = 1000mL = 1000cm^3]
水的高度:
80 000 / ( 40 * 40)
=50 cm
1b. 未注水的高度:
80 - 50
=30cm
要注入水:
40 * 40 * 30
=48 000cm^3
=48L
2. 原有果汁體積:
9 * 7 * 10
=630 cm^3
現有果汁體積:
630 + 126
=756 cm^3
現有果汁高度:
756 / ( 9 * 7)
=12 cm
果汁上升高度:
12 - 10
=2cm
3. 現有液體體積:
1.2 + 1.5
=2.7 L
=2700 cm^3
食物盒的高度:
2700 / ( 10 * 15)
=18cm
水的高度:
80 000 / ( 40 * 40)
=50 cm
1b. 未注水的高度:
80 - 50
=30cm
要注入水:
40 * 40 * 30
=48 000cm^3
=48L
2. 原有果汁體積:
9 * 7 * 10
=630 cm^3
現有果汁體積:
630 + 126
=756 cm^3
現有果汁高度:
756 / ( 9 * 7)
=12 cm
果汁上升高度:
12 - 10
=2cm
3. 現有液體體積:
1.2 + 1.5
=2.7 L
=2700 cm^3
食物盒的高度:
2700 / ( 10 * 15)
=18cm
參考: myself(:
2008-01-08 6:31 am
1a. 50cm
1b. 48升
2. 2cm
3. 18cm
1b. 48升
2. 2cm
3. 18cm
收錄日期: 2021-04-13 14:53:53
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080107000051KK04268