Q2 of 16 Page 38

Find constant of variation and write equation of variation for every example given below.

(1) ; if then


(2) ; when then


(3) ; if then


(4) ; if then


(1) (,)



(k=constant)







∴constant of variation is 60 and equation is


(2) (, )



(k=constant)


(1)




(from 1)


∴constant of variation is 60 and equation is


(3) (, )



(k=constant)


(1)




(from 1)


∴constant of variation is 100 and the equation is


(4) (, )



(k=constant)


(1)




(from 1)


∴constant of variation is 45 and equation is



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The total remuneration paid to laborers, employed to harvest soybeans is indirect variation with the number of laborers. If remuneration of 4 laborers is Rs1000, find the remuneration of 17 laborers.

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The information about numbers of workers and the number of days to complete work is given in the following table. Complete the table.

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The boxes are to be filled with apples in a heap. If 24 apples are put in a box then 27 boxes are needed. If 36 apples are filled in a box how many boxes will be needed?

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Write the following statements using the symbol of variation.

(1) The wavelength of sound (l) and its frequency (f) are in inverse variation.


(2) The intensity (I) of light varies inversely with the square of the distance (d) of a screen from the lamp.