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Question
Both u and v vary directly with each other. When u is 10, v is 15, which of the following is not a possible pair of corresponding values of u and v?
Options
2 and 3
8 and 12
15 and 20
25 and 37.5
Solution
15 and 20
Explanation:
Since, u and v vary directly, i.e u/v = k ...(Constant)
If u = 10 and v = 15, then, `u/v = 10/15 = 2/3`
In options,
`8/12 = 2/3`
`15/20 = 3/4`
`25/37.5 = 2/3`
So, `15/20 = 3/4` is not a possible pair of corresponding values of u and v.
Hence, `15/20 = 3/4`
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