Question

p unui dr este de 98cm. aflati lyngimea si latimea dr.stiind xa ele sunt patru numere consecutive​

Answer 1

Pdreptunghi=98cm

P=L×2+l×2

L×2+l×2=98cm

L=n+(n+1)+(n+2)+(n+3)

l=n+(n+1)+(n+2)+(n+3)

n×(1+2+3+4)

=>

2L+2l=98cm

2×[n×(1+2+3+4)]+2×[n×(1+2+3+3)]=98cm

==>2×(n×10)+2×(n×10)=98cm

==>2n×20+2n×20=98cm

==>4n×400=98cm

==>4n=0,245cm

==>n=0,245:4

==>n=0,06125cm

________________

L=0,06125+(0,06125+1)+(0,06125+2)+(0,06125+3)

L=0,06125+1,06125+2,06125+3,06125

L=6,245

l=6,245