Answers

2014-09-25T11:55:13+05:30
1) d = (40+65)/2 = 105/2 = 52.5
2) d = 40x+65y

=> 40x+65y = 52.5

Already, d is the half of both the numbers of 40 and 65 which is to be multiplied with x and y. 

Now, let x=y=0.5 (half of 1)

=> 40(0.5) + 65(0.5) = 52.5 = d
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