Xiaojun and Xiaoli go home from school. Xiaojun's distance is one sixth less than Xiaoli's, and Xiaoli's time is one ninth more than Xiaojun's. what's the speed ratio between Xiaojun and Xiaoli?

Xiaojun and Xiaoli go home from school. Xiaojun's distance is one sixth less than Xiaoli's, and Xiaoli's time is one ninth more than Xiaojun's. what's the speed ratio between Xiaojun and Xiaoli?

If Xiaoli's distance is 6S, Xiaojun's distance is 5S, Xiaojun's time is 9t, and Xiaoli's time is 10t
So the speed ratio is 5 / 9:6 / 10 = 25:27

In triangle ABC, a triangle is three continuous positive integers. The angle of the largest side is twice the angle of the smallest side. Find the perimeter of the triangle

According to the sine theorem
a/sinA=b/sinB=c/sinC
Let B = a + 1, C = a + 2, C = 2A
A * sinc = C * Sina
A * sin2a = (a + 2) Sina and sin2a = 2sinacosa
Cosa = (a + 2) / 2A
According to the cosine theorem
cosA=(b＾2+c＾2-a＾2)/2bc b=a+1 c=a+2
A ＾ 2-3a + 4 = 0, a = 4, perimeter 15

The length of one right side of RT triangle is 11, and the other two sides are fed with continuous natural numbers to calculate the perimeter,

Let a right angle side be x and the hypotenuse be (x + 1)
Square of 11 + square of x = (x + 1)
x=60
60+1=61
The perimeter is 60 + 61 + 11 = 132
The other two sides are 60 and 61, and the perimeter is 132