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Two paper screens A and B are separated ...

Two paper screens A and B are separated by 150m. A bullet pierces A and B. The hole in B in 15 cm below the hole in A. If the bullet is travelling horizontally at the time of hitting A, then the velocity of the bullet at A is: `(g=10ms^(-2))`

A

`100sqrt3ms^(-1)`

B

`200sqrt3ms^(-1)`

C

`300sqrt3ms^(-1)`

D

`500sqrt3ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
d
Range =`150=ut and h=15/100=1/2xxgr^(2)`
or `t^(2)=(2xx15)/(100xxg)=30/100`
`:. T=(sqrt3)/10`
`:. U=150/t=(150xx10)/(sqrt3)=500sqrt(3) ms^(-1)`
`:. (R_(2))/(R_(1))=1`
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