A) 1:2:4
B) 1:2:5
C) 1:3:5
D) 1:3:9
Correct Answer: C
Solution :
\[{{x}_{1}}=\frac{1}{2}a{{\left( 10 \right)}^{2}}=50a\] \[{{x}_{2}}=\left( 10a \right)\left( 10 \right)+\frac{1}{2}a{{\left( 10 \right)}^{2}}=150a\] \[{{x}_{3}}=\left( 20a \right)\left( 10 \right)+\frac{1}{2}a{{\left( 10 \right)}^{2}}=250a\] \[\Rightarrow {{x}_{1}}:{{x}_{2}}:{{x}_{3}}::1:3:5\]s
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