Question

kamal fires a gun at 10.30am when bala starts on his car towards kamal.kamal fires it second time after 10min and 30sec but bala heres the second shot ten min after hearing first shot.what was bala's speed in kmph,if the speed of sound in air is 330m/s​

Answer 1

Hey Dear,

◆ Answer -

Bala's speed = 59.4 kmph

● Explaination -

# Given -

v = 330 m/s

t = 10 min = 600 s

t' = 10:30 min = 630 s

# Solution -

Let v & v' be the velocity of sound and that of car.

At the time of first shot,

s = v × t

s = 330 × 630

s = 207900 m

At the time of second shot,

s = (v - v') t'

207900 = (330 + v') 600

v' - 330 = 207900 / 600

v' - 330 = 346.5

v' = 16.5 m/s

v' = 16.5 × 18/5

v' = 59.4 kmph

Therefore, Bala's speed is 59.4 kmph

best luck dear...

Answer 2

Answer:

59.4kmph

Step-by-step explanation:

D=S*T

=330*30

=9900

Speed of Bala=9900/10*60

=33/2m/s

=33/3*18/5

=59.4kmph