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If $l : m : n = 1 : 2 : 4$, then $\sqrt{5l^2 + m^2 + n^2}$ is equal to: |
4n 5l 2m 5 |
5l |
If $l : m : n = 1 : 2 : 4$, then $\sqrt{5l^2 + m^2 + n^2}$ is equal to = ? Put the values in required equation, $\sqrt{5(1)^2 + (2)^2 + (4)^2}$ = $\sqrt{5 + 4 + 16}$ = 5 So , we know the value of l = 1 So, according to the options the answer will be 5l |
