Problems on Time and Work - III - Grade 8 - Mathematics - kwizNET Math/Science/English Homeschool/Afterschool/Tutoring Lessons/Worksheets/Quizzes/Trivia

Grade 8 - Mathematics 9.10 Problems on Time and Work - III

Directions: Solve the following problems. Also write at least 5 examples of your own.

Q 1: Jacob can construct 1/3 of wall in 20 days. Cole can construct 2/3 of wall in 30 days. Jack can construct 1/2 of wall in 15 days. If all the three work together, in how many days will they construct 13/9 of the wall. 22 days 16 days 18 days 20 days

Q 2: A can do a piece of work in 8 1/2 days. A works for 2 days B joins A. They work for one day, the capacity of B is double the capacity of A. On the 4th day the work is completed by A and B with the help of a boy. In how many days the boy can do the work. 15 days 17 days 16 days 18 days

Q 3: Harry can construct 2/3 of a wall in 40 days. Eric can construct 1/2 of the wall in 75 days. Adam can construct 3/4 of the wall in 75 days. If all the three work together, in how many days will they construct 5/6 of the wall. 20 days 25 days 22 days 23 days

Q 4: John, Peter and Matt can do a piece of work in 10 days. Peter and Matt can do it in 20 days. Matt alone can do it in 30 days. In how many days John and Matt can do the work together. 11 days 13 days 12 days 10 days

Q 5: 12 men and 8 women can do a piece of work in 16 days. 13 men and 4 women can do it in 18 days. How long will 3 men and 12 women take to do it. 22 days 25 days 24 days 23 days

Q 6: 8 men and 12 women can do a piece of work in 9 days. 10 men and 20 women can do the same work in 6 days. How long will 5 men and 15 women take to do it. 13 days 10 days 11 days 9 days

Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!