two men working together can complete a job in 1 hour 20 minutes. the first man working alone can complete the task in two hours
. how long will it take the second man to finish the job if he worked alone
1 answer:
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Answer:
Approximately 67.348 litres can be put in six hemispherical bowl with a diameter of 35 centimetres.
Step-by-step explanation:
The volume of a hemisphere (), measured in cubic centimetres, is obtained from this formula:
Where is the radius of the hemisphere, measured in centimetres.
We know that radius is the half of the diameter (), measured in centimetres, then:
()
Now, we get the volume of each hemispherical bowl:
The total volume of six hemispherical bowl is:
From Physics we know that 1 litre equals 1000 cubic centimetres. Then:
Approximately 67.348 litres can be put in six hemispherical bowl with a diameter of 35 centimetres.
Answer:
C
Step-by-step explanation:
The circumference (C) of a circle = 2πr ← r is the radius
Given C = 15π the equating gives
2πr = 15π ( divide both sides by 2π )
r = = 7.5 cm
The area (A) of a circle is calculated using the formula
A = πr² = π × 7.5² = 56.25π cm² → C