Question

A house has a hemispherical roof 10m in diameter. Find the cost of painting the curved surface of the roof at $1.50 per square metre​

Answer 1

Answer:

Cost pf Painting = $235.62

Step-by-step explanation:

Diameter of Roof = 10m (Given)

Radius of Roof =

$\frac{diameter}{2}$

= 10/2 = 5m

Curved Surface Area of Hemisphere =

$(2\pi {r}^{2} )$

= 2 x π x 25

= 157.08 m2

Cost of painting 1 m2 = $1.50

Cost of Painting 157.08 m2 = 157.08 x $1.50 = $235.62

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