The natural frequency of a truck horn is 800 Hz. The driver of a car perceives the horn to be960 Hz. Given that both the truck and car are moving and have a relative speed of 61 m/s, whatare their individual speeds

The velocity of the truck is  

The velocity of the car is    

Explanation:

From the question we  are told that

   The natural  frequency of a truck horn is  

   The apparent frequency of the truck horn is  

   The relative speed is

Generally the relative speed when the truck and the car are moving towards each other is

Here are the velocities of the truck and the car respectively

=>  

Generally the apparent frequency is mathematically represented as

Here v is the speed of sound with value

=>      

=>      

=>    

From the above equation we have that

=>      

=>          

are their multiple choices ?

explanation:

12000j is work done