A photograph of a bacteria enlarged 50,000 times attains a length of 5cm a sshown 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?

(a) The length of Ramesh's notebook is 9cm 5mm. What will be its length in cm?

What is the length of the wooden stirp required to frame a photograph of length and breadth 32 cm and 21 cm respectively?

An object is placed at 20 cm in front of a concave mirror produces three times magnified real image. What is focal length of the concave mirror ?

A steel tape Im long is correctly calibrated for a temperature of 27.0 ^(@) C . The length of a steel rod measured by this tape is found to be 63.0 cm on a hot day when the temperature is 45.0^(@) C .What is the actual length of the steel rod on that day? What is the length of the same steel rod on a day when the temperature is 27.0^(@) C ? Coefficient of linear expansion of steel = 1.20 xx 10^(-5) K^(-1) .

A steel tape 1 m long is correctly cailbrated for temperature of 27.0^(@)C . The length of a steel rod measured by this tape is found to be 63.0 cm on a hot day when the termperature is 45.0^(@)C . What is the actual length of the steel rod on that day? What is the length of the same steel rood on a day when the temper ature is 27.0^(@)C ? alpha of steel is 1.20xx10^(-5)""^(@)C^(-1) ?

The radius of curvature of a spherical mirror is 20 cm. What is its focal length ?