Here 10 programmers, type 10 lines within 10 minutes then 60 lines can be typed within 60 minutes. How many programmers are needed?

A man and a boy received Rs. 800 as wages for 5 days for the work they did together. The man's efficiency in the work was thrice times that of the boy. What are the daily wages of the boy?

• [A] Rs. 76
• [B] Rs. 56
• [C] Rs. 44
• [D] Rs. 40

A and B working together completed a job in 5 days. If A works twice as efficiently as he actually did and B works 1/3 of actual efficiency, the work would have completed in 3 days. Find the for A to complete the job alone.

• [A] 6(1/2)
• [B] 6(1/4)
• [C] 6(3/4)
• [D] 12(1/2)
• [E] None of these

If 12 men and 16 boys can do a piece of work in 5 days; 13 men and 24 boys can do it in 4 days, then the ratio of the daily work done by a man to that of a boy is:

• [A] 4 : 1
• [B] 3 : 1
• [C] 1 : 1
• [D] 2 : 1
• [E] 1 : 2

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

A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B had to leave and A alone completed the remaining work. The whole work was completed in :

• [A] 8 days
• [B] 10 days
• [C] 12 days
• [D] 15 days