Question

Помогите плиз =(
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1) Дано:
V = 4 Гц
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T - ?
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2) Дано:
T = 0,5c;
t = 3c;
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N - ?
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Дано:
V = 1,256 $frac{m}{c}$ ;
T = 4c;
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R - ?
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Answer 1

T=1/V
T=1/4=0,25 c
2) T=t/N
N=t/T
N=3/0,5=30/5=6
3) V=2πR/T
R=VT/2π
R=1,256·4/2·3,14=5,024/6,28=0,8 m