MathDB

Mustafa bought a big rug. The seller measured the rug with a ruler that was supposed to measure one meter. As it turned out to be

30

meters long by

20

meters wide, he charged Rs

120.000

Rs. When Mustafa arrived home, he measured the rug again and realized that the seller had overcharged him by

9.408

Rs. How many centimeters long is the ruler used by the seller?

3