Direction: A shopkeeper has some kg. rice of same price. He sold 150 kg. rice at 25 Rs. per kg. and earned a profit of 25%, another 180 kg. rice is sold at a profit of 20% and rest are sold at a loss of 10%. If the shopkeeper earns Rs. 1230 profit on all the rice that he has sold then answers the following question:

If the shopkeeper sells his all rice at a profit of 20%, find the new profit. 

13x -14= 9x+10 what is the value of x ?

If a + b: b+c : c+a= 6:7:8 and a + b+c= 14, , then the value of c is : 

A can write 75 pages in 25 hrs. A and B together can write 135 pages in 27 hrs. In what time can B write 42 pages?

If the length of the diagonal AC of a square ABCD is 5.2 cm, then the area of the square is: 

If (a+b)=16 and a³+b³=1456, then what is the value of ab?

What mathematical operation should come at the place of ‘?’ in the equation:
2 ? 6 – 12 ÷ 4 +2 =11.

In a regular polygon, the exterior and interior angles are in the ratio 1 : 4. The number of sides of the polygon is