Answer:
-5/12
Step-by-step explanation:
2/3x (1/4-7/8)
2/3 * (2-7/8)
2/3 * (-5/8)
-5/12
It’s the light blue one!!!
Step-by-step explanation:
first take out
radius from the given diameter using the logic I.e diameter is double of radius
than after that use the circumference of circle formula I.e 2 pie r
or
directly we can get circumference by
using formula
pied
I.e 22/7 × 20
and answer is 62.85
9514 1404 393
Answer:
- slant height: 2.1 cm
- pencil area: 51.12 cm^2
Step-by-step explanation:
The slant height (s) is the hypotenuse of the right triangle with legs of 2 cm and 0.5 cm.
s^2 = 2^2 + 0.5^2 = 4 + 0.25
s = √4.25 ≈ 2.0616 ≈ 2.1
The slant height is about 2.1 cm.
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The surface area of the whole pencil is the sum of the areas of the circular base, the lateral area of the cylindrical part, and the lateral area of the cone.
A = πr^2 +2πrh +πrs
A = πr(r +2h +s) = (3.14)(0.5 cm)(0.5 cm + 2×15 cm + 2.1 cm)
A ≈ 51.12 cm^2
The area of the whole pencil is about 51.12 cm^2.