A person can see clearly upto 1 m. The nature and power of the lens which will enable him to see things at a distance of 3 m is

A far-sighted man can see clearly at a distance of 1.0m . The power of the lens that would make him see clearly at a distance of 0.2m is

A person can see clearly upto 2.5 m. Find the type and the power of lens that should be used so that he can see upto 10 m clearly.

For a long sighted man the least distance of distinct vision is 100 cm. Calculate the power of the lens that will enable him to see an object placed at a distance of 50 cm.

A person can see things clearly upto 3m what is the power of lens he should use so that he can see upto 12 m ?

A person can see things clearly upto 3m what is the power of lens he should use so that he can see upto 12 m ?