Aroom has dimensions 6.8m x 9.2m. steven wants to paint the walls of the room. a large tin of paint covers 20m^2 and cost £11.75. ignoring windows and doors, and allowing for 2 coats of paint, how much will it cost steven to paint the room.

Total cost to paint the room = £73.51

Step-by-step explanation:

Given:

Dimensions of the room = 6.8 m 9.2 m

Cost of tin of paint = £11.75

A tin of paint covers an area = 20

To find the cost of painting the room with two coats of paint.

Solution:

Area of the room =

We will use unitary method to find the amount of paint required for the room.

If of area is covered by 1 tin of paint.

For of area, amount of paint required = of a tin

Then, for amount of paint required = tins of paint.

For double coats twice paint must be required.

So, total amount of paint required for painting the room with two coats of paint = tins of paints.

Using unitary method to find total cost.

If 1 tin of paint costs = £11.75

6.256 tins of paint will cost =

Total cost to paint the room = £73.51

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50