CGL 23 21-07-2023 Shift 2


Question 1


Two pipes S1 and S2 alone can fill an empty tank in 15 hours and 20 hours respectively. Pipe S3 alone can empty that completely filled tank in 40 hours. Firstly both pipes S1 and S2 are opened and after 2 hour pipe S3 is also opened. In how much time tank will be completely filled after S3 is opened?

दो पाईप S1 तथा S2 एक खाली टंकी को अकेले क्रमशः 15 घंटे तथा 20 घंटे में भर सकते हैं। पाईप S3 उस संपूर्ण रूप से भरी हुई टंकी को अकेले 40 घंटे में खाली कर सकता है। सबसे पहले दोनों पाइप S1 तथा S2 को खोला गया तथा 2 घंटे बाद पाइप S3 को भी खोला गया है। S3 खुलने के बाद टंकी कितने समय में संपूर्ण रूप से भर जायेगी?

Options

A

92/11 hours

92/11 hours

B

89/12 hours

89/12 hours

C

90/17 hours

90/17 hours

D

90/13 hours

90/13 hours


Solution:

Correct Answer:

A

92/11 hours

92/11 घंटे


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