Question

Simplify the ratio :
$\frac{1}{5}:\frac{1}{20}:\frac{1}{35}$

• A. $28:7:4$
• B. $4:28:7$
• C. $28:4:7$
• D. $7:4:28$

Answer 1

The correct option is A

$28:7:4$

$\frac{1}{5}:\frac{1}{20}:\frac{1}{35}$

$\text{L.C.M of 5,20,35 is 140.}$

$=\frac{1}{5}\times 140:\frac{1}{20}\times 140:\frac{1}{35}\times 140=28:7:4$