Question

The design of a microchip has the scale $40:1$. The length of the design is $18cm$, the actual length of the microchip is $\frac{9}{m}$, then m =?

Answer 1

The design of a microchip has the scale $40:1$

$\because$ The length of the design $=18cm$

$\therefore$ Actual length of the microchip $=18\times \frac{1}{40}$

$=\frac{9}{20}$

$\therefore m=20$