What is the difference between the total number of gloves sold in both the towns together in February

The number of gloves sold in Town B increased by what percent from October to December 

The sum of the radium and height of a cylinder is 18m. The total surface area of the cylinder is 792 m², what is the volume of the cylinder? (in m3)

Ram and Sam are travelling from point A to B, What are 60 km apart. Travelling at a certain speed Ram takes one hour more than Sam to reach point B. If Ram doubles his speed he will take 30 min less than Sam to reach point B. At what speed was Ram driving from Point A to B

A  bag contains 5 red balls, 7 yellow balls and 3 pink balls. If the two balls are drawn at random from the bag, one after another, what is the probability that the first ball is red and the second ball is yellow

The sum invested in Scheme B is twice the sum invested in Scheme A. Investment in Scheme A is made for 3 years at 8% p.a. simple interest and in Scheme B for 2 years at 9% p.a. simple interest. The total interest earned from both the schemes is INR 1800/-. How much was invested in Scheme A