A can complete a piece of work in 12 days and B is 60% more efficient than A. In how many days B will complete the same work ?
A) 8.7 hrs
B) 5.2 hrs
C) 5 hrs
D) 7.5 hrs
Answer: D) 7.5 hrs
Explanation:
Ratio of times taken by A and B = 160 : 100 A can do the work in 12 days Let B can do the work in "D" days => 160:100 = 12 : D => D = 12 x 100/160 = 7.5 hrs
X can complete 5/7 part of a work in 10 days and Y can complete 3/4 part of the same work in 9 days. In how many days will both complete 13/21 part of the total work?
P can make a table in 16 days while Q can make it in 20 days. Q started the work and did that work for 5 days. In how many days P can complete the remaining work?
Type 1 workers are 2.5 times as efficient as type 2 workers. Twelve Type 1 workers can complete a task in 10 days. How many days would it have taken 4 Type 1 and 15 Type 2 workers to do the same work?