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Question Number 103449 by aurpeyz last updated on 15/Jul/20

Answered by Worm_Tail last updated on 15/Jul/20

$$V=\sqrt{v_{boat}^2+v_{river}^2-2v_{boat}{v}_{river}cos\left(70\right)}$$$$V=\sqrt{{12}^2+{12}^2-2\left(12\right)\left(12\right)cos\left(70\right)}$$$$V=\sqrt{189.4982}$$$$V=13.765m.s^{-1}$$$$sin\theta =\frac{sin70}{13.765}\times 12=0.81920$$$$\theta ={sin}^{-1}0.81920=55$$$$diretn=55-20=35$$$$$$

Commented by aurpeyz last updated on 15/Jul/20

$$\mathrm{thanks}\mathrm{sir}$$

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