42. It takes 1O hours for the bus to travel from place A to place B, and 15 hours for the truck to travel from place B to place A. At the same time, two cars travel in the opposite direction from both places. When they met, the bus traveled 80 kilometers more than the truck. Find out the distance between Party A and Party B.
43. There are 27O parts. Party A will finish it in 5 days and Party B will finish it in 4 days. Divide these parts among two people. How much should everyone get if they want to finish it at the same time?
44. The production time of each farm tool in the farm tool factory has been reduced from seven minutes to four or five minutes. L4O kinds of farm tools were produced every day. How many farm tools are produced every day now (by positive-negative ratio solution)?
45. Pave the 16OO block needed by the first workshop with square bricks with a side length of 4 decimeters; Now it is paved with square bricks with a side length of 5 cents. How many pieces (proportion) are needed?
46. There are two meshing gears, the big gear with 96 teeth and the small gear with 16 teeth; If the big gear rotates 1OO revolutions per minute, how many revolutions (proportion) does the pinion rotate every 40 seconds?
47. There is a pool of water. When the water turns into ice, its volume increases by L/11; When ice melts into water, its volume is reduced by a fraction.
48. Take a box of 168 light bulbs first, then take the remaining 2/3, leaving l/7 of the total. How many light bulbs are there in this box?
49. In the sixth grade, 1.5 students participated in the extracurricular activity group, and then two students participated in the extracurricular activity group. The actual number of participants is 1/3 of the rest. How many students joined the extracurricular activity group?
50. The original ratio of the two training teams was 4: 3, and 48 people were transferred from Team A to Team B. Now the ratio of the two teams is 2: 3. How many people are there in Team A?