Question

If the third proportion of 36 and 54 is “0.5k”, then

Third proportion of two numbers a and b is ba. So, 0.5k 5436 81 Or, k 162 Required value 162 - 28 162 20 134 182 67 91

find the value of (k − 28) : (k + 20).

A 67:91

B 3:5

C 2:3

D 7:10

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Solution