Question
Madan, Naveen and Jeevan are working in the same
company. They ride from their apartments to their company with speeds in the ratio 2 : 5 : 7. If, in total, they take 177 minutes (sum of the time taken by each one) to cover the distance (which is the same for all), then find the time taken by Jeevan to cover the distance.Solution
Speeds are in the ratio 2:5:7, so times are in the inverse ratio 1/2 : 1/5 : 1/7. Taking LCM of 2, 5, 7 = 70: Madan's time = 70/2 = 35x Naveen's time = 70/5 = 14x Jeevan's time = 70/7 = 10x Total time = 35x + 14x + 10x = 59x = 177 minutes So, x = 177 / 59 = 3 Jeevan's time = 10x = 30 minutes.
‘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 in
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:
