Answer:
10 hours
Step-by-step explanation:
Find the unit rate by dividing kilograms/hours. 16 kilograms in 8 hours is 16/8=2 kg per hour. If 20 kilograms, then divide 20 by the unit rate 2.
20kg/2kg per hour = 10 hours
How much of each solution should the teacher mix together to get 105 ML of 60% sugar solution for an experiment?
1. Look at how 60% is closer to the solution of lower concentration (50%). You can deduce that you will be mixing a higher volume of the 50% solution.
2. All 4 answers add up to 105ml.
3. The intuitive answer is the first option:
70 ML of the 50% solution and 35 ML of the 80% solution
4. Let's check whether point 3 is true.
70ml/105ml X 0.5 + 35ml/105ml X 0.8 = (35 + 28)/105= 63/105= 60% / 105 ml = 105ml of 60% sugar solution
Олшчлиомдыдмшщулоовоыщ:))
It would take him 12 days.
1/3 x 3 = 3
3x4=12
Answer:
2 x 20 + 2 x 15 = 40 + 30 = 70
Step-by-step explanation:
2x20=40
2x15=30
40+30=7
