12. If three numbers are in the rat...
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12. If three numbers are in the ratio 2:3:5 and the twice their sum is 100. Find the square of the largest of the three numbers. RRB NTPC (Phase I) 2016 (1) 225 (2) 625 (3) 25 (4) 100

11th - 12th Class
Maths
Solution
143
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12. (2) According to the question, [ begin{aligned} 2(2 x+3 x+5 x) &=100 10 x &=50 Rightarrow x=5 end{aligned} ] ( therefore ) [ 1=10,11=15 text { and } | 1=25 ] Hence, required square of number [ =(25)^{2}=625 ]
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