Question
How many bullets can be made out of a lead cylinder 32cm
high and 12 cm radius, each bullet being 4 cm in diameter?Solution
Volume of cylinder = π x r2  x h = π x 122  x 32 = 14482.3 cm3   & Volume of each bullet = (4/3) x π x 23  = 704/21 cm 3  So number of bullets = Volume of cylider/volume of 1 bullet = 14482.3/(704/21) = 432
‘A’ alone can do some work in 10 days. ‘B’ and ‘C’ together can do the same work in 12 days. If ‘B’ is half as efficient as ‘A’, the...
- Ajay completes half the work done by Rohit in 5/6 of the time. If they together finish the work in 18 days, how much time will Rohit take to complete the w...
- Raj alone can complete a work in 25 days. Mohan is five times as efficient as Raj. Find the percentage of work completed by Raj and Mohan together in 5 day...
A and B can complete a piece of work in 12 days and 16 days respectively. They work together for 4 days, and then A leaves. How many more days will B ta...
- If ‘X’ finishes a project in 24 days whereas ‘X’ and ‘Y’ working together can finish it in 15 days, then determine the time ‘Y’ alone will ...
x men can finish a work in y days. 0.9x women can finish 1/3rd of the same work in (y - 8) days. If 0.8x women can complete 1/3rd work in 36 days. Find ...
John, Emily, and Michael can each complete a task in 15 days, 20 days, and 18 days, respectively. They decide to work on the task alternately, starting ...
- 25 employees working 9 hours a day take 20 days to complete a project. How many employees working for 8 hours a day are needed to complete twice the given ...
A and B together can complete a work in 20 days. After working together for 8 days, B leaves, and A completes the remaining work in 16 more days. In how...
The efficiency of A, B, C, D are in the ratio of 6 : 5 : 4 : 3. If A and C can do a work together in 6 days. Then How much days B and D will take to com...
Relevant for Exams:
