X and Y are centres of circles of radius 9 cm. and 2 cm respectively XY=17 cm. Z is the centre of a circle of radius r cm which touches the above circles externally. Given that - ∠xzy = 90^o the value of r is -

If the area of a circle, inscribed in a equilateral triangle is 4 π cm², then what is the area of the triangle?

The difference between the selling prices of some articles if sold for Rs.12 per article instead of Rs.9 per article is Rs.150. If the sold price of these articles is Rs.250 then find the selling price of 21 articles if profit earned is 20%.

Simplify the following expression.

 25-(4÷2)+11.5+9.5

If the sum of a number and its reciprocal be 2, then the number is-

The sum of all interior angles of a regular polygon is twice the sum of all its exterior angles.  The number of sides of the polygon is

If  $$ {A\over2}={B\over 3}={C\over 4}$$ then what is the value of $$ {A+B+C}\over C

Directions: The bar chart given below shows the percentage distribution of the production of various models of a mobile manufacturing company in 2007 and 2008. The total production in 2007 was 35 lakh mobile phones and in 2008 the production was 44 lakh. Study the chart and answer the following questions.
Percentage of six different types of mobiles manufactured by a company over two year

Total number of mobiles of models A, B and E  manufactured in 2007 was