please help me.... to answer those questions....
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rockmitalipurushotam:
kya aap seven mein Ho
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20. (a)12/22
(b)7/22
21. let the width be x
length=3x
diagonal=l+1=3x+1
Now diagonal=√(l^2+b^2)
3x+1=√(3x)^2+x^2
(3x+1)^2=9x^2+x^2
9x^2+1+2×3x×1=10x^2
9x^2+6x+1=10x^2
x^2-6x-1=0
x^2-2×x×3+3^2-3^2-1=0
(x-3)^2=9+1
(x-3)=√10
x=(√10+3)m
So,length=3x=(3√10+9)m=(9.48+9)m=18.48m
width=(√10+3)m=(3.16+3)m=6.16m
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(b)7/22
21. let the width be x
length=3x
diagonal=l+1=3x+1
Now diagonal=√(l^2+b^2)
3x+1=√(3x)^2+x^2
(3x+1)^2=9x^2+x^2
9x^2+1+2×3x×1=10x^2
9x^2+6x+1=10x^2
x^2-6x-1=0
x^2-2×x×3+3^2-3^2-1=0
(x-3)^2=9+1
(x-3)=√10
x=(√10+3)m
So,length=3x=(3√10+9)m=(9.48+9)m=18.48m
width=(√10+3)m=(3.16+3)m=6.16m
please mark it as brainliest and follow me
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