Question

The line $AD$ is divided in the ratio of $AB:BC:CD=1:3:4$. If $AB=0.8cm$, calculate the length of $AD$.

• A. $3.5cm$
• B. $6.4cm$
• C. $5.89cm$
• D. $6.5cm$

Answer 1

Answer: (B)

$6.4cm$

Given, $AB:BC:CD=1:3:4$ and $AB=0.8cm$

Then $BC=3\times 0.8=2.4cm$ and $CD=4\times 0.8=3.2cm$

From figure,

$AD=AB+BC+CD$

$=0.8+2.4+3.2$

$=6.4cm$