The following pie-chart shows the monthly expenditure of a family on various items. If the family spends Rs. 825 on clothing, answer the question

What percent of the total income does the family save

The following Pie-chart shows the monthly expenditure of a family on various items. If the family spends Rs. 825 on clothing. Answer the question

What percent of the total income does the family save

The expression of Cot θ + Cosec θ – 1 / Cot θ +Cosec θ + 1 is equal to                                    

A man on the top of a tower, standing on the sea-shore, finds that a boat coming towards him takes 10 minutes for the angle of depression to change from 30⁰ to 60⁰. How soon the boat reach the sea-shore

A vertical tower stands on a horizontal plane and is surmounted by a vertical flag staff of height h. At  a point on the plane, the angle of elevation of the bottom of the flag staff is a and that of the top of the flag staff is β. Then the height of the tower is

From the top of a cliff 100 metre high, the angles of depression of the top and bottom of a tower are 45⁰ and 60⁰ respectively. The height of the tower is