A projectile is to be projected towards enemy territory at the same horizontal level. The initial velocity of the projectile is known to be `100 pm 1 m//s` Initial angle of the projectile is known to be projected `45^(@) pm 1^(@)` What is the possible range of the projectile?

Options

A. `990mleRle 1010m`
B. `980mleRle1020m`
C. `970mleRle1030m`
D. `930mleRle970m`

Answer

B

Explanation

`R=(u^(2)sin20)/g=(100^(2)xx1)/10=1000m`
`(DeltaR)/R=(2Deltau)/u+(cos20)/sin20xxDeltatheta`
`(DeltaR)/1000=(2xx1)/100rightarrowDeltaR=20m`
`980mleRleR1020m]`