It is given that V varies directly as the square of W,
when V decrease 36%,W will also decrease x%.
Find the value of x.
plx show your steps clearly.
ans: x%=20
Maths - Variations
2007-03-01 1:46 pm
回答 (1)
2007-03-01 3:11 pm
✔ 最佳答案
V = kW^2V(1-36%) = kW^2
W = (V/W)^0.5
W' = (0.64V/W)^0.5
x% = (W' - W) / W * 100%
x% = -20
So, x% = 20
2007-03-04 15:25:28 補充：
V=kW^2W^2=V/kW=(V/k)^0.5
參考: 自己計
收錄日期: 2021-04-12 23:48:04
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