Question

solve this numerical

Answer 1

Distance covered by stone ,s= 500m
initial speed,u= 0
time,t=?
acceleration, g= 10ms-2

$s = ut + \frac{1}{2} gt {}^{2}$
$500 = 0 \times t + \frac{1}{2} \times 10 \times {t}^{2}$
500= 5* t2
${t}^{2} = \frac{500}{5}$
${t}^{2} = 100$
$t = \sqrt{100}$
t= 10s
now

$speed \: of \: sound = \frac{distnce \: trvelled \: }{time \: taken}$
$340 = \frac{500}{time \: taken}$
$time \: taken = \frac{500}{340} s$
=1.47s
time after which splash is = 10s+1.47s
heard at the top of tower = 11.47 s