Answer :

If a and b vary inversely to each other.


i.e. ab = k(constant)


For table (a),



If a = 6 and b = 18


Then, a


k = 108


When a = 8 and b = p, then


ab = k


8×p = 108



When a = q and b = 39, then


ab = k


q× 39 = 108



When a = 25 and b = r, then


ab = k


25 × r = 108



For table (b),



If a = 6 and b = 15


Then, a


k = 90


When a = 2 and b = x, then


ab = k


2× x = 90



When a = y and b = 12.5, then


ab = k


y× 12.5 = 90



When a = 10 and b = z then


ab = k


10 × z = 90



For table (c),



If a = 6 and b = 1


Then, a


k = 60


When a = l and b = 5, then


ab = k


l×5 = 60



When a = 9 and b = m, then


ab = k


9× m = 60



When a = n and b = 25, then


ab = k


n × 25 = 60



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