Question

1)За першу годину поїзд пройшов 68 км. а за другу- 84 км .Знайди середню швидкість поїзда за цей час. 2)На скільки частка чисел 20988 і 53 більша від частки чисел 12420 і 46

Answer 1

1)68+84=152

2)152:2=76 км/год -середня швидкість

 

1)20988:53=396-перша частка

2)12420:46=270-друга частка

3)396-270=126-більша перша частка

Answer 2

Calculation of Average Speed

To find the average speed of the train, we need to divide the total distance traveled by the total time taken. In this case, we have two different distances and we need to calculate the average speed for the entire duration.

Given: - Distance covered in the first hour: 68 km - Distance covered in the second hour: 84 km

To calculate the average speed, we need to find the total distance covered and the total time taken.

Total distance covered = Distance in the first hour + Distance in the second hour = 68 km + 84 km = 152 km

Total time taken = 1 hour + 1 hour = 2 hours

Now, we can calculate the average speed using the formula:

Average speed = Total distance covered / Total time taken

Substituting the values:

Average speed = 152 km / 2 hours = 76 km/h

Therefore, the average speed of the train for the given time period is 76 km/h.

Calculation of Difference in Fractions

To find the difference between the fractions, we need to subtract the numerator of one fraction from the numerator of the other fraction and then subtract the denominator of one fraction from the denominator of the other fraction.

Given: - Numerator of the first fraction: 20988 - Denominator of the first fraction: 53 - Numerator of the second fraction: 12420 - Denominator of the second fraction: 46

To calculate the difference, we subtract the numerator and denominator of the second fraction from the numerator and denominator of the first fraction, respectively.

Difference = (Numerator of the first fraction - Numerator of the second fraction) / (Denominator of the first fraction - Denominator of the second fraction)

Substituting the values:

Difference = (20988 - 12420) / (53 - 46) = 8568 / 7 = 1224

Therefore, the difference between the fractions is 1224.

I hope this helps! Let me know if you have any further questions.