In the given filed the area under triangular shape is

Directions : What should come in place of the question mark (?) in the following number series? 

19 38 ? 228 684 1368 

10 year ago, the ages of A and B were in the ratio 13 :17 respectively. 17 year from now the respective ratio of their ages will be 10:11. what is the age of B at present?  

Geeta weighs 11.235 kg . Her sister weighs 1.4 times her weight . Find their combined weight ? 

Perimeter of rectangle with length 76 meter and breadth 48 meter: 

Rajan purchased two ceiling fans at the rate Rs. 2,500 each. Out of which one fan was sold at 15% profit and other was sold at 8% loss. How much profit or loss percentage is obtained in the whole transaction? 

α and β  is two root of a equations $$2x^2-7x+ 12=0 $$ then the value of $$ {α \over β }  + {β \over α }=? $$

Directions : What should come in place of the question mark (?) in the following number series? 

474 459 429 369 249 ?