ll.find the constant variation of the following variation

21. E is inversely proportional to z and z = 4 when E = 6.

22. a varies directly as n. if n = 12 then a = 9.

23. T varies as the square root of Land L = 82 then T = 10.

24. m varies jointly as I and n, m = 13 when I = 39 and n = 3.

25. s varies jointly as square oft and square of r, as s = 72 and t and requals to 2 and 3 respectively.
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