Answer:
The radius of cylinder is 1.05 cm and
The height of cylinder is 2.11 cm
Step-by-step explanation:
Given as :
The total surface area of cylinder = 21 cm
The curved surface area of cylinder =
of the total surface area
I.e The curved surface area of cylinder =
× 21 = 14 cm
∵ The total surface area of cylinder = 2
r h + 2
r²
Where r is the radius and h is the height of cylinder
Or, 2
r h + 2
r² = 21 cm
Or,
= 21 cm ....a
Again ∵ The curved surface area of cylinder = 2
r h
Where r is the radius and h is the height of cylinder
Or, 2
r h = 14 cm . ...b
so . put the value of a into b
I.e 14 cm +
= 21 cm
Or,
= 21 cm - 14 cm
Or,
= 7
so , r² = 
∴ r² = 
I.e r = 
So, radius =
cm
or, r = 1.05 cm
Put the value of r in eq b
2
r h = 14 cm
Or, 2
×
× h = 14 cm
So, h = 
Or, h = 2.11 cm
Hence The radius of cylinder is 1.05 cm and The height of cylinder is 2.11 cm Answer
The answer is 3.1
(2*0.5)-(3*-0.7)
1-(-2.1)
1+2.1
3.1
44 + 77 = 111
The answer is 111 feet.
If Jerry bought four DVDs for $25.20 and you would like to know what was the unit rate, you can calculate this using the following step:
$25.20 / 4 = $6.30
Result: The unit rate was $6.30.
Answer:
Out of the prime factors of 9408, only 3 is without pair. So, 3 is the number by which 9408 must be divided to make the quotient a perfect square.