Zadanie 1 strona 175 klasa 3 gimnazjum.
Oblicz objętość i Pc walców przedstawionych na ponizszych rysunkach.
a)
r=2
H=10
V=πr²H = π*2²*10=4π*10=40π
P=2πr²+2πrH = 2π*2² + 2π*2*10= 8π + 40π = 48π
b)
d=6 --> r=3
H=8
V=π*3²*8=72π
P=2π*3² + 2π*3*8 = 18π + 48π = 66π
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a)
r=2
H=10
V=πr²H = π*2²*10=4π*10=40π
P=2πr²+2πrH = 2π*2² + 2π*2*10= 8π + 40π = 48π
b)
d=6 --> r=3
H=8
V=π*3²*8=72π
P=2π*3² + 2π*3*8 = 18π + 48π = 66π