Question

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
]

# 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

Solution