A) 4 : 6 : 7 : 9
B) 16 : 24 : 30 : 35
C) 8 : 12 : 15 : 7
D) 30 : 35 : 24 : 16
Correct Answer: B
Solution :
\[a:b=\frac{2}{9}:\frac{1}{3}=2:3\] \[b:c=\frac{2}{7}:\frac{5}{14}=4:5\] \[d:c=\frac{7}{10}:\frac{3}{5}=7:6\] \[\Rightarrow \] \[c:d=6:7\] Thus, \[a:b=2:3\] \[b:c=4:5\] \[\underline{c:d=6:7}\] \[a:b:c:d=2\times 4\times 6:3\times 4\times 6:3\times 5\times 6:3\times 5\times 7\] \[=16:24:30:35\]You need to login to perform this action.
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