Question

дикая утка от южного до северного моря летит 7 дней. дикий гусь от северного до южного моря летит 9 дней. через сколько дней они встретятся, если вылетят одновременно? Должно получится 3целых 15/16 дней

Answer 1

Пусть расстояние будет равно 630 км, тогда
630:7= 90 (км)-пролетит утка за день
630:9= 70 (км)- пролетит гусь за день
90+70=160(км)- пролетают за один день утка и гусь
630:160 = 3,94 (д.)

Ответ:через3,94 дня встретятся утка с гусем.

Answer 2

Calculating the Meeting Point of the Duck and Goose

To calculate the meeting point of the duck and the goose, we can use the concept of LCM (Least Common Multiple) of the time taken by each bird to fly from one sea to the other.

Given: - The wild duck takes 7 days to fly from the southern to the northern sea. - The wild goose takes 9 days to fly from the northern to the southern sea.

We need to find the least common multiple of 7 and 9 to determine when they will meet.

Calculating the Least Common Multiple (LCM)

The LCM of two numbers can be calculated using the formula: LCM(a, b) = (a * b) / GCD(a, b)

Where LCM is the Least Common Multiple, a and b are the two numbers, and GCD is the Greatest Common Divisor.

Finding the Least Common Multiple of 7 and 9

To find the LCM of 7 and 9, we can use the formula: LCM(7, 9) = (7 * 9) / GCD(7, 9)

Calculating the Greatest Common Divisor (GCD) of 7 and 9

The GCD of two numbers can be calculated using various methods such as prime factorization, Euclidean algorithm, or using a calculator.

Conclusion

By calculating the LCM of 7 and 9, we can determine the number of days it will take for the wild duck and the wild goose to meet.