2 years ago in Time and Work

A works twice as fast as B. If B can complete a work in 12 days independently, the number of days in which A and B can together finish the work in :

[A] 4 days
[B] 6 days
[C] 8 days
[D] 18 days

Attempted 0
Correct 0
Incorrect 0
Viewed 0

Related Questions

• [A] 1 hour
• [B] 2 hours
• [C] 3 hours
• [D] 4 hours
• [E] 5 hours

• [A] 12
• [B] 14
• [C] 16
• [D] 18
• [E] 15

Two pipes A and B can fill a cistern in 12 min and 16 min respectively. Both the pipes are opened together for a certain time but due to some obstruction the flow of water was restricted to 7/8 of full flow in pipe A and 5/6 of full in pipe B. This obstruction is removed after some time and tank is now filled in 3 min from that moment. How long was it before the full flow.

• [A] 8 min
• [B] 3 min
• [C] 5.6 min
• [D] 4.5 min
• [E] None of these

At a Tech Pvt Ltd. there are some engineering students employed as trainee engineers, belong to two eminent institutions of India. One group belongs to IIT and another to NIT. Each student of IIT works for 10 hours a day till 60 days and each student of NIT works for 8 hours a day till 80 days on the two same project. The ratio of students of IIT and that of NIT is 4:5 respectively. Students of which institution is slower in work and by how much?

• [A] IITian is 20% less efficient
• [B] NITian is 33.33% less efficien
• [C] NIT is 25% less efficient
• [D] IIT is 33.33% less efficient
• [E] Cannot be determined

• [A] Rs. 800
• [B] Rs. 600
• [C] Rs. 900
• [D] Rs. 750