Worker a takes 8 hours to do a job. Worker b takes 10 hours to do – McqOptions

MCQOPTIONS

1.	Worker a takes 8 hours to do a job. Worker b takes 10 hours to do the same job. How long should it take both a and b, working together but independently, to do the same job?
A.	30/6 Days
B.	30/9 Days
C.	40/10 Days
D.	40/9 Days
Answer» E.

Discussion

No Comment Found

Related MCQs

The mechanical advantage of a lifting machine is the ratio of
  1, 6, 13, 22, 33, ? Find the next number.
Find The number of students who can sit in a class room with length 20m and breadth 9m, if each student requires a space of 90cm × 80m.
A man can row 40 km upstream and 55 km downstream in 13 hours also, he can row 30 km upstream and 44 km downstream in 10 hours. Find the speed of the man in still water and the speed of the current.
  The length of a room is 6m and the length is twice the breadth. If the area of the floor is 162m2, find the area of the four walls of the room.
  An uneducated retailer marks all its goods at 50% above the cost price and thinking that he will still make 25% profit, offers a discount of 25% on the market price. What is the actual profit on the sales?
  Bangalore and Ooty are two stations 390 km apart. A train starts from Bangalore at 10 a.m. and travels towards Ooty at 65 kmph. Another train starts from Ooty at 11 a.m. and travels towards Bangalore at 35 kmph. At what time do they meet?
  1, 3, 7, 15, 31, 63, ? Find the missing series.
  8, 24, 12, 36, 18, 54, ?  Find the missing number.
How many words can be formed by using all letters of the word ‘daughter’ so that the vowels always come together?