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Question: H = H.M. and G = G.M. of numbers a and b (a \> b), if H : G = 4 : 5 then a : b =...

H = H.M. and G = G.M. of numbers a and b (a > b), if H :

G = 4 : 5 then a : b =

A

5 : 4

B

4 : 1

C

5 : 1

D

None

Answer

4 : 1

Explanation

Solution

AG=GH=54\frac { \mathrm { A } } { \mathrm { G } } = \frac { \mathrm { G } } { \mathrm { H } } = \frac { 5 } { 4 } ̃ = 5+524255242\frac { 5 + \sqrt { 5 ^ { 2 } - 4 ^ { 2 } } } { 5 - \sqrt { 5 ^ { 2 } - 4 ^ { 2 } } }

= 5+353\frac { 5 + 3 } { 5 - 3 }= 82=41\frac { 8 } { 2 } = \frac { 4 } { 1 }