Time & Work, Chain Rule

Karim and Bablu can build a wooden table in 3 days. Bablu can do it alone in 5 days. How many days would it take Karim to do this job alone?

Pooja is twice as efficient as Aarti and takes 90 days less than Aarti to complete the job. Find the time in which they can finish the job together.

A, B and C can complete a piece of work in 14, 6 and 12 days respectively. Working together, they will complete the work in ________ .

The price of a loaf of bread was increased by 20%. How many leaves can be purchased now by the amount of money used to buy 300 loaves at the earlier price?

In a training camp, 18 men can eat 20kg of rice in 3 days. How long will 6 men take to eat 40kg of rice?

Five boys or 9 girls can do a piece of work in 19 days.In how many days can 3 boys and 6 girls do this work?

How many times in a day, are the hands of a clock in straight line but opposite in direction?

Q. 31 - 60: Read the following questions carefully and choose the right answer.
৩১) A man can walk uphill at the rate of 2.5km/hr and downhill at the rate of 3.25km/hr. If the total time required walking a certain distance up the hill and return to the starting position is 4 hr 36 min, what is the distance he walked up the hill?

X, Y and Z can do a piece of work in 6 hours. X and Y can do the work in 8 hours and Y and Z can do the same work in 12 hours. In how many time will X and Z do the work?

Bill and Ben can clean the garage together in 6 hours. If it takes Bill 10 hours working alone, how long will it take Ben working alone?

While working 7 hour a day, A alone can complete a piece of work in 6 days and B alone in 8 days . In what time would they complete it together, 8 hour a day?

Nikki is 25% more efficient than Tina. Tina alone can build a craft in 20 days. Find the number of days taken by Nikki to finish the same piece of work?

Rahim can hammer 20 nails in 6 minutes. Charlie can do the same job in only 5 minutes. How long will it take them to hammer 22 nails if Rahim hammers the first 5 nails, then Charlie hammers for 3 minutes and finally Rahim finished the job?

If machine A polishes x units in 12 minutes and machine B polishes 5x units in 40 minutes, in how many minutes will A and B, working together, polish 50x units?

In an election a candidate who gets 84% of the votes is elected by a majority of 476 votes. What is the total number of votes polled?

Assurance company has a project that wil take 1000 person days to complete. How many days will it take to complete the project if the company has 50 workers?

A cricket team has won 40 games out of 60 played. It has 32 more games to play. How many of these must the team win to make it record 70% win for the season?

An examiner checks 4 scripts in 5/3 hours. How many scripts can be check in 50 minutes?

Mr. Ronaldo can finish a Task in 20 days and Mr. Messi can do in 30 days. With help of Mr. Salah, they did the job in 10 days only. Then how many days are necessary to complete the task by Mr. Salah?

Working alone, pump A can empty a pool in 3 hours. Working alone, pump B can empty the same pool in 2 hours. Working together, how many minutes will it take pump A and pump B to empty the pool?