Short Concepts

If 18 men can cut a field in 35 days, then in how many days can 21 men cut the same field?

From the top and bottom of a straight hill, the angle of depression and elevation of the top of a pillar of 10 m height are observed to be 60° and 30° respectively. The height (in metres) of the hill is

The value of \({30.25 \% \space of \space 40200} \over 16.75 \% \space of \space 24200\)is

When an article is sold at its marked price, it gives a profit of 25%. If a discount of 9.6% is allowed on the marked price, then the profit percent will be :