Study the graph and answer the following questions. The graph shows the number of bicycles parked in the parking space of a hall at various points of time.

What is the percentage decrease in the number of parked cycles between 7 pm and 8 pm? (in whole number)

Study the graph and answer the following questions. The graph shows the number of bicycles parked in the parking space of a hall at various points of time.

Charges for parking is Rs. 1 per hour. What will be the total collection from 9 AM to 7 PM

A telegraph post is bent at a point above the ground. Its top just touches the ground at a distance of 8√3 m from its foot and makes an angle of 30° with the horizontal. The height (in metre) of the post is

A right circular conical structure stands on a circular base of 21m diameter and is 14m in height. The total cost of colour washing for its curved surface at Rs. 6 per sq. m. is
(Take Π = 22/7 )

If cos 21° = x/y, then cosec 21° -­ cos 69° is equal to

The area of the circle with radius Y is W. The difference between the areas of the bigger circle (with radius Y) and that of the smaller circle (with radius X) is W'. So x/y is equal to

Length of the sides of a triangle are a, b, c respectively. If a2 + b2 + c2 = ab +bc + ca then the triangle is

Length of the sides of a triangle are a, b, c respectively. If a2 + b2 + c2 = ab +bc + ca then the triangle is