- A30
- B27
- C63
- D36
Step-by-Step Solution
Rani's rate = 1/18 − 1/45 = 5/90 − 2/90 = 3/90 = 1/30, so Rani alone takes 30 days.
Answer: A) 30
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Time & Work / Pipes practice questions