You ask your best friend to lend you ₹300 to buy your favourite toy. she says she can lend you the money only if you give her an extra ₹3 for every three months that pass before you return it.
what is the total amount you must pay her if you return it after nine months?

After 9 months, you will return ₹309

Step-by-step explanation:

The amount of money you borrowed from your friend is  ₹300.

If you are paying an extra amount of ₹3 every 3 months, then after 9 months, you are paying an extra amount of ₹9

The total amount you must pay her if you return the money after 9 months is  ₹ ₹

Total amount to be paid is ₹309.

Step-by-step explanation:

We are given that the best friend lends us ₹300 to buy a toy on a condition that we must pay her ₹3 for every three months that pass before we completely return it.

So if we return the money in nine months, then we have to pay her ₹9 extra which makes the total amount to be paid ₹309.

there are lots of ways.   pick's theorem tells us if the vertices are lattice points the area a is

a = b/2 + i - 1

where b is the number of boundary lattice points and i is the number of interior lattice points.

in the figure i count b=16, i=50 so

a = 8 + 50 - 1 = 57

let's try the shoelace formula.   the area is half the sum of the cross products of the sides.  

a(-2,6)   -2(2)-6(-5) = 26

b(-5,2)   -5(-3) - 2(-2) = 19

c(-2,-3) -2(-3) - (-3)(4) = 18

d(4,-3)   4(3) - (-3)(5) = 27

e(5,3)   5(3) - 3(1) = 12

f(1,3)     1(6) - 3(-2) = 12

a(-2,6)

each of the cross products is twice the area of the triangle with the associated side and one vertex the origin. so the area of abo=26/2=13.

area = (1/2) (26 + 19 +   18 + 27 + 12 + 12) = 57

that checks!

answer is 144

step-by-step explanation: