Pie chart shows the percent of money spent by family on various item during 1999. Study the graph and answer these questions.

If the total amount spent was Rs. 46,000, how much money was spent on clothing and housing together?

$${I.{(13)^{2}}-14+28=x}$$
$${II.{(16)^{2}}-8×7=y}$$

Directions :- Refer the graph and answer the given questions.
 The following line graph shows the number of products sold by company A and B during six years.

The number of products sold by A in 2014 is what per cent of the number of products sold by B in 2013?

The difference between the compound interest and simple interest of a certain sum of amount is rupees 256.40 for 4 years at 10% rate per annum. Find the sum of money?

A sum of money doubles itself at compound interest in 15 years. In how many years it  will become eight times?

Rachit invests ₹12,000 for a 2-year period at a certain rate of simple interest per annum. Prasad invests ₹12,000 for a 2- year period at the same rate of interest per annum as Rachit, but in Prasad's case the interest is compounded annually. Find the rate of interest per annum if Prasad receives ₹172.80 more as interest than Rachit at the end of the 2-year period. 

If the interest is compounded half yearly, then interest on Rs.16000 at 5% per annum, at the end of $$ {{1}{1\over 2}}$$ years is.

If x is real then the minimum value of (x²-x-1) is :