To paint the curved surface of the silo, the farmer will need 3 cans of paint, which will cost £35.25 in total.
To calculate the cost of painting the curved surface of the silo, we first need to find the area of the curved surface.
The surface area of a cylinder is given by the formula A = 2πrh, where r is the radius (half of the diameter) and h is the height.
In this case, the radius is 8/2 = 4 metres and the height is 6 metres.
Substituting these values into the formula, we get A = 2π(4)(6) = 48π square metres.
Now we can calculate the number of paint cans needed.
Each can covers 20 square metres, so the total number of cans needed is 48π / 20 = 2.4π.
Round this up to the nearest whole number to get 3 cans.
Finally, we can calculate the cost of the paint.
Each can costs £11.75, so the total cost is 3 cans × £11.75/can = £35.25.
The probable question may be:
On a farm, there is a grain silo.
The silo is cylindrical with a tile roof.
The silo has a diameter of 8 metres and is 6 metres tall
The farmer wants to paint the curved surface of the silo Each can of paint will cover 20m^2.
The paint costs £11.75 per can.
How much will it cost the farmer to paint the silo?
Use π =3.14