Question
The radii of two concentric circles are 20 cm and 25 cm.
A straight line PQRS intersects the larger circle at the points P and S and intersects the smaller circle at the points Q and R. If QR = 32 cm, then the length (in cm.) of PS is:(Approx.)Solution
In the right triangle OQM. OM = √ (20²- 16²) = √144 = 12cm In the right triangle OMS. Let RS = x cm So, (25) ² = (12) ² + (x + 16) ² (x + 16) ² = 625 – 144 = 481 x + 16 = 21.9 x=21.9 - 16 =5.9 x = 5.9 So, PS = 2 × (16 + 5.9) = 43.8 cm
According to RBI,which country was the largest source of FDI in India for the year 2016-17?
Under the provisions of the Industrial Disputes Act 1947, the employer of any industry declares lay-off, is required to provide alternate employment to ...
The main determinant of real wage is:
What term is used to describe inflation caused by an increase in the cost of production inputs?
Which type of union avoids political action and resorts to strikes only when necessary?
The principle of indemnity aims to prevent:
Which of the following statement is/are incorrect about “Gross Domestic Product”?
I. Gross Domestic Product (GDP) is that i...
Who among the following founded the city of Ahmedabad?
____provides a mutually acceptable solution between both the disputing parties and brings about speedy settlement of disputes without resorting to strik...
In Indian Economy, who are Marginal Workers?
...
