Work Problems( Week 13 Practice)
1. Jane can mop the floor of her house in 30 minutes while her brother can do it in 20 minutes. How many minutes will it take to mop the floor if they work together? 2. An experienced worker can paint an average of 24 square feet per hour while a less experienced worker can paint 21 square feet per hour. How many less experienced workers will be needed to paint the same area as 14 experienced workers within the same time frame? 3. A water tank was full. After 4 gallons of water were poured out, the tank is full. How many gallons of water will the tank hold when it is full? 4. Tom can mow 420 square yards of grass in 1 hours. At this rate, how many minutes would it take him to mow 630 square feet of grass? 5. A work crew of 4 people requires 4 weeks and 1 day to finish a certain task. How many work days would it take a work crew of 12 people to finish the same task if each person of both crews works at the same rate? Note that each week has 5 work days.