Unhygienic surroundings…………..health problems.

An equal sum is invested for six years in scheme A offering simple interest at X% p.a. and in Scheme B for two years offering compound interest at 10% p.a. (compounded annually). The interest earned from Scheme A is double the interest earned from Scheme B. Had the rate of interest been X+2% simple interest p.a. in scheme A, the difference in the interests earned from both the schemes would have been INR 3960/-, what was the sum invested in each of the scheme

Ram bought two articles- A and B at a total cost of INR 8000/- He sold article A at 20% profit and article B at 12% loss. In the whole deal he made no gain and no loss. At what price should Ram have sold article B to make an overall profit of 25% 

Rohan travelling at a speed of ‘X’ km/h took 2 hours 30 min to cover ²/₃^rd of the distance. Travelling at a speed of ‘X+2’ km/h, he took 50 min to cover the remaining 1/3^rd of the same distance. What was the total distance

Number of female members in health club E is what percent less than number of male members in health club B

What is the central angle corresponding to number of (both male and female) in health club B