Q57. Difference in the place values of 3 used at two places in the number 934530 is:

Q40. Find the area of four walls of a room having length 12.5 m, breadth 9 m and height 7 m

Q11. The area of the largest circle, that can be drawn inside a rectangle with sides 63 cm and 42 cm is (π = )

Q13. If A: B=2/3:5/8, B: C=1/3:5/9 and C:D = 5/6:3/4 then the ratio A: B: C: D is: