Question

A length of a bacteria enlarged 50,000 times attains a length of 5 cm. What is the actual length of the bacteria? If the length is enlarged 20,000 times only, what would be its enlarged length?

• A. $5cm$
• B. $3m$
• C. $2cm$
• D. $4cm$

Answer 1

Answer: (C)

$2cm$

Original length $=x$ cm When it is enlarged by $50000$

New length is $5cm$

$50000x=5$ $\Rightarrow x=\frac{5}{50000}cm$

$x={10}^{-4}$cm

If enlarged by $2000$

New length $=20000\times x$

$=20000\times \frac{5}{50000}$

New length $=2cm$