Question

P, Q,and R can finish a task in 8,10 and 12 hours respectively. They started working together but after 3 hours P and R left. How long will Q take to finish the task now?

Answer 1

Step-by-step explanation:

Assume task completed in total x hours

given

$\frac{x}{10} + \frac{3}{8} + \frac{3}{12} = 1 \\ 12x + 45 + 30 = 120 \\ 12x = 45 \\ x = \frac{15}{4} = 3 \frac{3}{4} hours$

So Q will take 45minutes more

Answer 2

Answer:

Step-by-step explanation:

Soory please ask from doubts....