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A stationary man observes that the rain ...

A stationary man observes that the rain strikes him at an angle of `60^(@)` to the horizontal. When he begins to move with a velocity of `"25m/sec"` then the drops appear to strike him at an angle `30^(@)` from horizontal. Calculate the velocity of the rain drops.

Text Solution

Verified by Experts

`3x-7y^2+3xyz=3(2)-7(-4)^2+3(2)(-4)(1)`
`=6-7xx16-6xx4`
`=6-112-24`
`=6-136`
`=130`
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