Question

Determine the total surface area of a hemisphere of diameter 16 cm.
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Answer 1

Answer:

expenses incurred annually in respect of a factory having 8 machines of similar nature. 1. Lighting of the factory Rs 800 2. Supervision Rs 900 3. Repairs Rs 2400 4. Rent and rates Rs 4000 5.Attendants: Two persons looking after machine paid Rs 60 per month each 6. Interest paid on loan Rs 2000 7. Power consumed for the shop at 10 paise per unit Rs 9600 8. Depreciation per machine Rs 300 9. Sundry supplies for the factory Rs 240 10. Each machine consumes 10 units of power in an hour. Calculate machine hour rate if a machine runs for 1200 hours in a year.

Answer 2

The hemisphere's total surface area is 602.88cm²

Given,

The diameter of the hemisphere is 16cm.

To Find,

The surface area of the hemisphere.

Solution,

Given that,

The hemisphere has a diameter of 16cm.

We need to find out the surface area of the hemisphere.

To find the surface area of the hemisphere the using formula is,

3$\pi$r².

Here, 16cm is the diameter, therefore the radius will be

12 / 2 = 8cm.

So, the surface area of the given hemisphere will be,

3$\pi$r² = 3 × $\pi$ × 8²

3 × 3.14 × 64 =602.88cm²

Hence, 602.88cm² is the total surface area of the hemisphere.

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