1.  A veranda 40 meters long 15 meters broad is to paved with stones each measuring 6 dm by 5 dm. the number of stones required is ?
A. 1000
B. 2000
C. 3000
D. None of these

Answer: Option B

Explanation:

Length = (40 x 10 ) dm = 400 dm.

Breadth = (15 x 10 ) dm = 150 dm.

Area of veranda = (400 x 150 ) dm2

Area of one stone = (6 x 5 ) dm2

∴ Required number of stones = (400 x 150) /(6 x 5) = 2000