The engineering team built a road, and the length ratio of the repaired road to the unrepaired road was 1 5,490 meters later, the length ratio of the repaired road to the unrepaired road. It's exactly three o'clock. How long is this road?

Answer; 490/[3/4- 1/6]=840[ m]

2 Workshop A and Workshop B * * have 8 1 person, and Workshop A's 1 equals Workshop B's 1. How many people are there in Workshop A and Workshop B respectively?

Answer; [1/4 1] ratio [1/5 1]=4 to 5.

4 plus 5=9

8 1 times 4/9 = 36[ person]

8 1 5 multiplied by 9 = 45 [person].

There are 450 boys and 9% girls 10 in Hope Primary School, and girls are several percentage points more than boys. The number of boys is a few percent less than that of girls.

Answer; 450 times 9 10=500[ person]

[500-450]/450=50/450= about 1 1 point 1.

[500-450]/500=50/500= 10%.

That's my answer. Are you satisfied?