Question

The design of a mocrochip has the scale 40:1 the length of the design is 18cm find the actual I ength of the microchip

Answer 1

Scale = 40:1

=> design length : actual length = 40:1


given that length of design = 18 cm

design length : actual length = 40:1

=> 18cm : actual length = 40:1

=> 18 cm / actual length = 40 / 1

=> actual length = 18cm × 1/40

=> actual length = 9/20 cm

=> actual length = 0.45 cm

Answer 2

here is your answer OK

real Length of the microchip be x

the proportion is

40 : 1 : : 18 : x

so...........

18 = 40 × x

x = 18/40 = 9/20

so real length of microchip is 9/20cm

so answer will be 0.45 OK