SSC Government Jobs Exams Numerical Ability Ratio and Proportion

Three numbers are in the ratio 3 : 4 : 5
and the sum of their squares is equal to 200.
Find the numbers

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SSC Other Question

In a family of a few persons, there are
4 fathers, 6 sons and 3 grandsons. How many
family members are there?
Rationalise the denominator and find
the answer to 2 decimal places