There are answers to 50 questions on ratios in the second volume of the sixth grade

X:21＝6:14 X:4/5＝5/12:10 26:X＝1:2

2:120＝1:X 5:X＝ 10∶15 7.5／1.5＝X∶3

1／6∶1／3＝1／5∶X X∶24＝3∶8 1／2∶1／3＝X∶1／2

12: The fertilizer factory plans to produce 7,200 tons of fertilizer. It has been in production for 4 months. The average monthly production of fertilizer is 1,200 tons. The remaining monthly production is 800 tons. How many months will it take to complete the production?

2. The plastic factory planned to produce 1,300 plastic modules and produced 780 pieces in 6 days. Based on this calculation, how many days will it take to complete the remaining production?

3. Master Li produced 252 parts in 4 hours in the morning, and worked for another 3 hours in the afternoon at this rate. How many parts does Master Li produce on this day?

4. The cement plant plans to produce 3,600 tons of cement and it will take 20 days to complete. The actual production is 20 tons more per day than planned. How many days will it actually take to complete the task?

5. A pile of 3.6 tons of coal is planned to be burned for 10 days. After improving the stove, it saves 0.06 tons per day than the original plan. How many days can this pile of coal be burned now?

6. Places A and B are 420 kilometers apart. A passenger bus plans to travel from place A to place B for 7 hours. I actually traveled 10 kilometers per hour more than originally planned. How many hours did it actually take to arrive?

7. Xiaoqiang returns to school from home. If he walks 50 meters per minute, he returns to school in 12 minutes. If he walks 10 meters more per minute, how early can he return to school?

8. To build a 6.4-kilometer-long road, the average construction time is 1.2 kilometers per month in the first three months, and the remaining 1.4 kilometers per month. How many months will it take to complete?