How to solve 8 (d) by using rule of three method??? Pls help me
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Q) 8(a) Ans : 54
8(a)
cost of pens is directly proportional to number of pens is.....and hence
number of pens : cost of pens
a : b : : c : d
25 : 112.5 : : 12 : x ( x : cost of 12 pens)
25 × x = 112.5 × 12 ( ad = bc)
x = 112.5 × 12 / 25
x = 54
hence....cost of 12 pens is ₹54
similarly others....but 8(d) is inversely proportional
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