S varies directly as T.

If S is 20 when T is 4, then T is a0 when S is 30

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Mathematics

15 July, 23:29

S varies directly as T.

If S is 20 when T is 4, then T is a0 when S is 30

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Answers (1)

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Akira Hooper · Answer 1

The answer is 6

S varies directly as T: S = kT (k - constant)

k = S/T

k = S1/T1

k = S2/T2

So: S1/T1 = S2/T2

S1 = 20

T1 = 4

S2 = 30

T2 = ?

20/4 = 30/T2

5 = 30 / T2

T2 = 30/5

T2 = 6

S varies directly as T.If S is 20 when T is 4, then T is a0 when S is 30

S varies directly as T.

If S is 20 when T is 4, then T is a0 when S is 30