Question
The height of a cylinder and that of a cone are in the
ratio 6:7 and the radii of their bases in the ratio 2:3. The ratio of their volumes will be?Solution
H1:H2 = 6:7 & R1:R2 = 2:3 So ratio of their volume = π x R1 2 x H1/(1/3 x π x R12 x H2) = 3 (R1/R2) 2 x (H1/H2) = 3(2/3) 2 x (6/7) = 8:7
The ratio of efficiencies of X and Y for doing a certain work is 5 ∶ 9. Working together, they can complete a work in 15 days. X alone will complete 6...
‘P’ alone can do 60% of a work in 18 days and ‘Q’ alone can do 30% of the same work in 9 days. ‘P’, ‘Q’ and ‘R’ together can finish ...
- If Rina can complete a project in 36 days by working 9 hours a day, how many hours per day should she work to complete the project in 18 days?
A can do a job alone in 66 days, B can do it alone in 55 days, while A, B, and C working together can complete the job in 11 days. In how many days can ...
A can complete a piece of work in 24 days. He worked for 21 days and then B finished the remaining work in 6 days. In how many days can A and B finish t...
A, B, and C together wrap up a task in 14 days. B and C together can finish it in (280/18) days, and C alone completes half in 14 days. Find the ratio o...
- If Priya takes five times the time that Kabir takes or six times the time that Aarav takes to finish a task, and all three working together can complete it...
28 men can complete a work in 20 days. 40 women can complete the same work in 28 days. 20 men and 12 women started working and after 16 days, 20 more wo...
Gagan can do a piece of work in 14 days. Magan is 40% more efficient than Gagan. How many days will Magan and Gagan together complete the work?
A man, a woman, a boy, and a girl can complete a certain task individually in 84 days, 105 days, 140 days, and 210 days respectively. How long will it t...
Relevant for Exams:
