Lipika reads a book for `1frac{3}{4}` hours everyday. She reads the entire book in 6 days. How many hours in all were required by her to read the book?

A person wants to read a book placed at 20 cm whereas the near poit of his eyes is 50 cm. Calculate the power of the lens required.

Read the bar graph given below which shows the number of books sold by a book store during five consecutive years and answer the following questions: Can you explain how you would estimate the number of books sold is 1989?

Nazima is fly fishing in a stream. The tip of her fishing rod is 1.8 m above the surface of water and the fly at the end of the string rests on the water 3.6 m away and 2.4 m from a point directly under the tip of the rod. Assuming that her rod to the fly) is taut, how much string does she have out(see fig)? If she pulls in the string at the rate of 5 cm per second, what will be the heriozontal distance of the fly from her after 12 seconds.