Question

Geometric mean of 2 numbers is 15. If by mistake one figure is taken as 5 instead of 3,find the corrected geometric mean.​

Answer 1

Answer:

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Step-by-step explanation:

√ab = 15

ab = 225

(1) When a = 5

then b = 225/5 = 45

(2) when a = 3 & b = 45

Then correct geometric mean

G.M. = √3*45 = √135 = 3√15

Answer 2

The given question is the geometric mean of 2 numbers is 15 .

√ab=15.

ab=225.

The a is wrongly taken as 5 instead of 3 .

with 5 as a the another number is

$225 \div 5 = 45$

b=45.

In geometric series the ratio is 9 . which means 5 times 9 is 45

The ratio will remain the same for another number also

If a is 3 then 9 times a is 27 .

on multiplying 3 and 27 we get 81.

ab=81

√ab is 9

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