Anature museum has 2008 specimens of early birds, some with 2 wings and some with 4 wings. the specimens have a total of 4038 wings. how many specimens are there with each number of wings?

Answer:

Step-by-step explanation:

Given :

Number of specimens in the museum =2008 specimens of early birds, Some with 2 wings and some with 4 wings.

Total number of wings the specimen have=4038

To Find:

Number of birds with 2 wings=?

Number of birds with 4 wings=?

Solution:

Let the number of birds with 2 wings be n,

then number of birds with 4 wings will be 2008 – n birds.

Now, total number of wings = 4038 wings  

=>2 wings x number of birds with 2 wings + 4 wings x number of birds with 4 wings = 4038 wings

=> 2 x n + 4 x (2008 – n) = 4038  

=>2n + 4 x 2008 – 4n = 4038  

=>2n + 8032 – 4n = 4038  

=>2n – 4n = 4038 – 8032  

=>- 2n = - 3994  

=>2n = 3994  

=>

=>n = 1997  

So, 1997 birds has 2 wings, then, 2008 – 1997 = 11 birds has 4 wings.

44

step-by-step explanation:

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.