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Question Number 95182 by i jagooll last updated on 23/May/20

Answered by mr W last updated on 23/May/20

$$\frac{1}{S}+\frac{1}{S+4}=\frac{1}{5}$$$$S^2-6S-20=0$$$$S=3+\sqrt{29}\approx 8.4h$$

Commented by i jagooll last updated on 23/May/20

$$\mathrm{thank}\mathrm{you}\mathrm{sir}$$

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