Numerical Reasoning: Working Together | Word Problems

1.) Jhe, Anna and Gem can decorate a birthday poster in 1.9 hours. If Jhe does the job alone, she can complete it in 5 hours. Anna can complete it in 7 hours. How long will it take Gem alone to complete the decoration? a. 5.45 hours b. 8.80 hours c. 6.25 hours d. 10.45 hours 2.) Marian can finish weaving a mat in three days. Elena can weave the same mat in 5 days and Cristel in 4 days. If the three of them work together, how long would it take them to weave the mat? a. 2.65 days b. 1.28 days c. 1.25 days d. 2.50 days