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To a man walking at the rate of 3 kmlh the rain appears to fall vertically. When he increases his speed to 6 kmlh it appears to meet him at an angle of 45° with vertical. Find the angle made by the velocity of rain with the vertical and its value. |
Answer» Solution : From the diagram `tan45^(@) =3/y`………..(i) and `tan THETA =3/y`……(2) From (1) and (2) `theta =45^(@)` and `THEREFORE sin 45^(@) =3/V_(R), 1/sqrt(2) =3/V_(R)` `V_(R) =3sqrt(2)` kmph |
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