Xiaoming and Xiaofang start from home to school respectively. Xiaoming takes 15 more miles than Xiaofang, and Xiaofang takes 18 more time than Xiaoming. So the speed ratio of Xiaoming and Xiaofang is () A. 5：8B. 8：5C. 27：20D. 16：15

Xiaoming and Xiaofang start from home to school respectively. Xiaoming takes 15 more miles than Xiaofang, and Xiaofang takes 18 more time than Xiaoming. So the speed ratio of Xiaoming and Xiaofang is () A. 5：8B. 8：5C. 27：20D. 16：15

Xiaoming's speed: (1 + 15) △ 1 = 65, Xiaofang's speed: 1 △ 1 + 18 = 89, the ratio of Xiaoming's speed to Xiaofang's speed is: 65:89 = 27:20, so choose: C

The speed ratio of a to B is 2:3 and the time ratio is 5:6. If B walks 900 meters, how many meters does a walk?

900 △ 3 × 2 = answer

When a and B workers go to work, home = a walks one fifth more than B, while B walks one eleventh less than A. what is the speed ratio between a and B

The distance ratio is 6:5
The time ratio of Party A and Party B is 11:10
The speed ratio of a and B is:
6/11：5/10=12：11

When a and B students come home from school, a has to walk 15 more ways than B, while B takes 111 less time than A. what is the speed ratio of a and B students to go home?

(1) A's itinerary is B's: (1 + 15) = 65, B's time is a's: 1-111 = 1011, then a's time is B's: 1110, the speed ratio of a and B is (65 / 1110): (1 / 1) = 12:11; a: the speed ratio of a and B's two students to go home is 12:11