Quantitative Aptitude - Arithmetic Ability Questions

The ratio of volume of a cone to that of a cylinder if cylinder radius is reduced by 4 times and its height increased by 8 times of that of the cone, is - 

Ram and Hari can cut 12 kgs nuts in 2 days. After 5 days, Hari left the work. Ram took 8 more days to cut the rest of the nuts. If total of 58 kgs of nuts were cut, the time taken by Hari to cut 10 kg of nuts is

8 men can complete a work in 16 days. 16 women can complete the same work in 24 days. In how many days can 4 men and 8 women complete the same work?

30 women do half of the total work in 30 days. How many more women will be required to complete the remaining work in 10 days?

If a+b=3 then the value of a3+b3+9ab-­27 is

A does 60% of a work in 15 days. He then calls B, and they together finish the remaining work in 5 days. How long B alone would take to do the whole work?

If A's salary is 40% less than that of B, then how much percent is B's salary more than that of A?

A student multiplied a number by 4/7 instead of 7/4. What is the percentage error in the calculation?