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daryazvarich
@daryazvarich
August 2021
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определите объем и сумму площадей всех граней прямоугольного параллелепипеда ребра которого равны 2\5 дм,1\4 дм и 1\2 дм
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kirichekov
Verified answer
V=a*b*c
a=2/5 дм
b=1/4 дм
c=1/2 дм
V=2/5 *1/4 *1/2=1/20
V=1/20 дм³
S=2*a*b+2*b*c+2*a*c
S=2*2/5*1/4+2*1/4*1/2+2*2/5*1/2
S=1/5+1/4+2/5=3/5+1/4=12/20+5/20=17/20
S=17/20 дм²
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Answers & Comments
Verified answer
V=a*b*ca=2/5 дм
b=1/4 дм
c=1/2 дм
V=2/5 *1/4 *1/2=1/20
V=1/20 дм³
S=2*a*b+2*b*c+2*a*c
S=2*2/5*1/4+2*1/4*1/2+2*2/5*1/2
S=1/5+1/4+2/5=3/5+1/4=12/20+5/20=17/20
S=17/20 дм²