Question

There is a $3D$ printer to create a miniature version of things. The scale to miniature is $0.4$ inches to $1$ foot of original height. If the original height of an object is $5$ feet $9$ inches, then what is the miniature height of the object?

• A. $2.0inches$
• B. $2.3inches$
• C. $2.6inches$
• D. $2.9inches$

Answer 1

Answer: (B)

Let the height of object be $x$ inches.

$\therefore 0.4:1::x:5.75$ $5$ feet $9$ inches$=(5+\frac{9}{12})=5.75$feet

Product of mean$=$Product pf extream

$\Rightarrow 1\times x=5.75\times 0.4\Rightarrow x=2.3$

$\therefore$ Height of object$=x=2.3$ inches.