4.
If a : b = c d = 3:5, then what are the values of ad : bc
a) 3:5
b) 5:3 c) 1:1 d) None of these​

1 thought on “4.<br />If a : b = c d = 3:5, then what are the values of ad : bc<br />a) 3:5<br />b) 5:3 c) 1:1 d) None of these​”

1. Answer:

   1 : 1

   Explanation:

   a : b = c : d = 3 : 5

   a / b = 3 / 5 c / d = 3 / 5

   5×a / 3 = b 5×c / 3 = d

   5a / 3 = b 5c / 3 = d

   ad : bc

   = a × 5c / 3 : 5a / 3 × c

   = 5ca / 3 : 5ca / 3

   = 1 : 1

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