When all the students in a school are made to stand in rows of 54, 30 such rows are formed. If the students are made to stand in rows of 45, how many such rows will be formed ?	Choose the correct choice from the following choices.
A) 31 B) 36 C) 38 D) 19 E) 21
Explanation:   Total number of students = 54 x 30   When arranged in rows of 45, number of rows formed are,   = 36.   Answer: 36
<result>B</result>
When all the students in a school are made to stand in rows of 54, 30 such rows are formed. If the students are made to stand in rows of 45, how many such rows will be formed ?