There were 28 1 person in both groups.

This manuscript has x words.

x/25=(x-600)/ 15

x/25=x/ 15-3000

3x=5x-3000

x= 1500

This manuscript contains 1500 words.

The bus travels 80 kilometers per hour, and the speed of the truck is three-quarters of the speed of the bus.

Then: the speed of the truck is: 80 * 3/4 = 60 km/h.

700/(80+70)= 14/3

5*5*5= 125 cubic centimeter

125/ 15=25/3 cm2

The bottom area of this part is 25/3 square centimeters.

Set this section of the road to be x meters long.

2/7x+2/7x- 16:x-2/7x-2/7x- 16 = 6:5

20/7x-80= 18/7x-96

2/7x= 16

x=56

This section of road is 56 meters long.