Question
Six years from now, Kirti's age will be twice the age of
her brother Kunal, but 4 years ago she was four times as old as Kunal was then. Find the present age of Kunal.Solution
Let the present age of Kirti =x and Kunal =y ATQ- After 6 years- X+6 = 2(y+6)            … (1) Before 4 years – x-4 = 4(y-4) x-4 =4y-16 x =4y-12        …. (2) put the value of x in Eq (1) 4y -12+6 =2y+12 4y -6 =2y+12 2y =18 Y =9 years.
‘A’ alone can complete a work in 50 hours. ‘A’ started the work alone and left after working on it for 10 hours. If ‘B’ completed the rest o...
40 tailors can stitch a batch of dresses in 30 days. If 20 tailors started the job and after 15 days ‘u’ more tailors joined them such that the rema...
A can complete a piece of work in 10 days and B can complete it in 15 days. They start working together, but B leaves after 3 days. In how many more day...
- An organization engaged 16 workers to complete a task in 24 days. After 9 days, 6 workers had to leave unexpectedly. How many additional days will it now t...
A contractor planned to complete a project in 5 days by employing ‘a’ workers. But every day exactly 15 workers were absent. As a result, the work g...
Arjun and Sameer can complete a job in 20 days and 25 days respectively. When Arjun, Sameer, and Nikhil work together, they finish it inÂ
M, N and O can complete a task in ‘t’, 100, and ‘t + 20’ days respectively. All three started together, but after 15 days, N dropped out. Then, ...
(x + 7) workers finish 60% of a job in 9 days working 4 hours/day. The remaining work is done by (x + 3) workers in 12 days working 3 hours/day. Find x.
A work can be completed by ‘A’ and ‘B’, alone in 10 days and 12 days, respectively. Find the number of days taken by ‘C’ to complete the sam...
A piece of work consists of 360 identical units. A can do (x + 4) units per day and B can do (x − 2) units per day. They work together for 9 days and ...
Relevant for Exams:
