A ball thrown by a boy is caught 2 seconds later by another boy some distance away on the same level. If the angle of projection is ${30}^0$, the velocity of projection is $\left(inm{s}^{-1}\right)$(If the Answer is in Decimal then round off to the nearest Integer value (Example i,e. If answer is above 10 and less than 10.5 round off is 10 and If answer is from 10.5 and less than 11 round off is 11))