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

Let enlarged length of bacteria be x .
Actual length of bacteria = 5/5000 = 1/10000 cm=10⁻⁴

Length 5 x
Enlarged length 50,000 20,000
Here length and enlarged length of bacteria are in direct proportion.

∴ 5/50000 = x/20000 ⇒ xX50000 = 5×20000 ⇒ x= 5×20000/50000 = 2cm
Hence, the enlarged length of bacteria is 2 cm.

Class 8 Maths Chapter 11 Exercise 13.1 Solution in Video

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