Practicing Success
X is twice as good as Y and Y is twice as good as Z while doing a task. If X and Y can complete the task in 16 days, then how many days will Z take to complete that task himself only. |
64 96 16 72 |
96 |
X : Y : Z Efficiency: 4 : 2 : 1 Now, X + Y : Z Efficiency: 6 : 1 Time : 1 : 6 ATQ, (X + Y )1R = 16 days Therefore, Z alone will do in = 6R = 6 × 16 = 96 days |