Question

a stone dropped from the top of a tower and it hits the ground at t 3.5 sec no i if the velocity of sound in the air is 300 find the time taken to hear the sound by a person on the top of the tower from the instant the body is dropped

Answer 1

Answer:

60 metrr is the hieht of a tower by the sound

Explanation:

because....…........

Answer 2

Answer:

T=3.7s

Explanation:

Case I:

Time taken by the stone to reach ground: t1=3.5 s

Height of the tower:h=1/2g(t1)^2  

                                   =1/2×10×(3.5)^2  

                                   =61.25 m

Case II:

Time taken by the sound to reach the person from ground:t2=hv  

                                                                                                      =61.25/300

                                                                                                       =0.2 s

Total time taken:T=t1+t2   =3.5 + 0.2   =3.7 s