The range of a projectile fired at angle of 15^(@) is 40m . If it is fired with the same speed at an angle of 45^(@)then, which one of the following statement is an incorrect statement ?

The range of a projectile fired at angle of 15^(@) is 40m . If it is f

1.	The range of a projectile fired at angle of 15^(@) is 40m . If it is fired with the same speed at an angle of 45^(@)then, which one of the following statement is an incorrect statement ?
Answer» FINAL range is twice the initial range. Final range is half of the initial range. Final range is greater then the initial range Final range is 80 m Solution :`R = (u^(2) sin 2 THETA)/(2)` `R prop sin 2theta` `(R')/(R) = (sin 2 (45))/(sin 2 (15)) = (sin 90)/(sin 30) = 2` (a) R' = 2R (b) `R' = 2xx 40 = 80 m ` (c) `R ' gt R` `:.` Option (b) is INCORRECT statement