If a machine consumes k/5 kilowatts of power every t hours, how much power in kilowatts, will three such machines consume in 10 hours? 

A man spends his 2 months income in 3 months and saves Rs 1500 in a year then Find his monthly income? 

The speed of three cars in the ratio 4 : 5 : 8 . What is the ratio among the time taken by these cars to travel the same distance ? 

A batsman in his 20th innings make a score of 110 and there by increases his average by 4. What is his average after 20 innings? 

If the length of a rectangle increased by 20 % and breadth is decreased by 12.5 % Find the percentage increase in the Area ?

P purchase an item for Rs 1200 and sold it on a profit of 10%. If he sells it at Rs 1380 then calculate his increase in profit percentage. 

If sinθ + cosecθ = 2, then the value of $$ sin^9 θ +cosec^9θ $$ is –

$$ sin^2 5° + sin^2 10°+sin^2 15°+.....sin^2 85°+sin^2 90°$$ is equal to