A person is swimming with a speed of $10 \mathrm{~m} / \mathrm{s}$ at an angle of $120^{\circ}$ with

Question

A person is swimming with a speed of $10 \mathrm{~m} / \mathrm{s}$ at an angle of $120^{\circ}$ with the flow and reaches to a point directly opposite on the other side of the river. The speed of the flow is ' $x$ ' $\mathrm{m} / \mathrm{s}$. The value of ' $x$ ' to the nearest integer is\

Professor PC Thomas Classes · Answer

(5) : Velocity along river, $v_{R}=10 \sin 30^{\circ}$\ $=10 	imes \frac{1}{2}=5 \mathrm{~m} / \mathrm{s}$\