Two parallel chords are drawn in a circle of diameter 30 cm. The length of one chord is 24 cm and the distance between the two chords is 21 cm. The length of the other chord is 30 cm 

A wholesaler sold a water purifier at a loss of 40%. If the selling price has been increased by Its. 125, then wholesaler will get the profit of 10%. What was the cost price of the purifier?

The value of an article depreciates every year at the rate of 10% of its value. If the present value of the article is  Rs 729, then its worth 3 years ago was

The graph of the equations 25x + 75y = 225 and x = 9 meet the point: 

A boat covers 35 km downstream in 2 h and covers the same distance upstream in 7 h. Find the speed (in km/h) of the boat in still water.  

If a number multiplied by 25 % of itself gives a number which is 200% more than the number, then 25% of the number is -

The ratio of two numbers is 3:8 and their difference is 115. The smaller of the two numbers is: