Question

12. If 494 = 343, then a : b is__
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Answer 1

Step-by-step explanation:

Third proportional is 343

So, ⟹A:B::B:343

Doing product of the extremes and product of mean, we get

B

2

=343A⟶(1)

Also, A:B=1:7

So, B=7A

So, (7A)

2

=343A

A=7

B=7A=49

A+B=49+7=56

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