Two numbers are in the ratio 3 : 5 and their HCF is 20. Their LCM is

Direction (94-98): Study the following table to answer the given questions.
         Centre and Post-wise Numbered of candidate

In Chennai, the number of clerks is approximately how much percent more than that of officers?

If $$ {y\over x-z}={y+x\over z}={x\over y}$$ the find x:y:z is?

What will be the greatest common factor of 96, 528, 2160, 3520?

7 men or 10 women can build a 100-meter-long wall in 10 days, then how many days will it take 14 men and 20 women to build a 600-meter-long wall?

Directions: The bar chart given below shows the percentage distribution of the production of various models of a mobile manufacturing company in 2007 and 2008. The total production in 2007 was 35 lakh mobile phones and in 2008 the production was 44 lakh. Study the chart and answer the following questions.
Percentage of six different types of mobiles manufactured by a company over two year

For which models was the percentage variation in production from 2007 to 2008 the maximum? 

The compound interest on Rs. 6250 at 12% per annum for 1 year, compounded half-yearly is

The height of a cone is 16 cm and radius of its base is 30 cm. If the rate of painting it is Rs.14/cm², then what will be the total cost in painting the curved surface of cone from outside?