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Q.

What is the value of the expression 28 x 4 ÷56x  ?
 


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a

5 2 x 3  

b

1 2 x 3  

c

3 2 x 3  

d

2 3 x 3   

answer is B.

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Detailed Solution

The given expression is 28 x 4 ÷56x  .
Writing the given expression in numerator and denominator form, we get,
28 x 4 ÷56x= 28 x 4 56x  
Divide the monomial in the numerator by the monomial in the denominator using the formula x m x n = x m−n ,  
28 x 4 56x = 28 56 × x 4 x = 1 2 x 3  
Therefore, on solving 28 x 4 ÷56x  , the result is 1 2 x 3  .
Hence, option 2 is correct.
 
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