Advertisements
Advertisements
प्रश्न
A can-do `1/4` of work in 5 days and B can do `1/3` of the same work in 10 days. Find the number of days in which both working together will complete the work.
उत्तर
A can-do `1/4` of work in = 5 days
A can-do 1 work in = 5 × 4 days
= 20 days
B can do `1/3` of work in = 10 days
B can do 1 work in = 10 × 3 days
= 30 days
A's 1-day work =`1/20`
B's 1-day work =`1/30`
(A+B)'s 1 day work =`1/20+1/30`
`=(3+2)/60`
`=5/60`
`=1/12`
∴ A and B working together will complete the work in = 12 days
APPEARS IN
संबंधित प्रश्न
36 men can do a piece of work in 7 days. How many men will do the same work in 42 days?
12 pipes, all of the same size, fill a tank in 42 minutes. How long will it take to fill the same tank, if 21 pipes of the same size are used?
In a fort 150 men had provisions for 45 days. After 10 days, 25 men left the fort. How long would the food last at the same rate?
In order to complete a work in 28 days, 60 men are required. How many men will be required if the same work is to be completed in 40 days?
A fort had provisions for 450 soldiers for 40 days. After 10 days, 90 more soldiers come to the fort. Find in how many days will the remaining provisions last at the same rate?
A can do a piece of work in 10 days; B in 18 days; and A, B, and C together in 4 days. In what time would C alone do it?
A and B can do a piece of work in 40 days; B and C in 30 days; and C and A in 24 days.
- How long will it take them to do the work together?
- In what time can each finish it working alone?
A can do a piece of work in 10 days, B in 12 days, and C in 15 days. All begin together but A leaves the work after 2 days and B leaves 3 days before the work is finished. How long did the work last?
P alone can do `1/2` of a work in 6 days and Q alone can do `2/3` of the same work in 4 days. in how many days will they finish `3/4` of the work, working together?
X alone can do a piece of work in 6 days and Y alone in 8 days. X and Y undertook the work for ₹ 48000. With the help of Z, they completed the work in 3 days. How much is Z’s share?
