ques tion no. 20 nd21
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20 =1.325*4=5.3. OK bro
rani12344:
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q. 20-
side which was common for both=1.325cm
square have 4sides
equilateral triangle have =3sides
total perimeter=1.325*6=7.95cm
( hence one side was common)
q. no-21
present age ratio =7:5
Leena present age =7x
meena present age =5x
after 10years their ages = 7x+10,5x+10
and then their ratio 9:7
means, their age after 10 years=9x,7x
so, 7x +10=9x. 2x=10. x=5
there fore their present ages are
7*5=35
5*5=25
I hope it's may help you
side which was common for both=1.325cm
square have 4sides
equilateral triangle have =3sides
total perimeter=1.325*6=7.95cm
( hence one side was common)
q. no-21
present age ratio =7:5
Leena present age =7x
meena present age =5x
after 10years their ages = 7x+10,5x+10
and then their ratio 9:7
means, their age after 10 years=9x,7x
so, 7x +10=9x. 2x=10. x=5
there fore their present ages are
7*5=35
5*5=25
I hope it's may help you
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