Question

Sarita bought 2/5 metre of ribbon and Lalita 3/4 metre of ribbon. what is the total lenght of the ribbon theybought ​

Answer 1

Answer:

Solution: By eliminating the row and column of an element, the determinant of remaining elements is the minor of the element, i.e. M i × j {{M}_{i\times j}} Mi×j and by using formula ( − 1 ) i + j M i × j {{\left( -1 \right)}^{i+j}}{{M}_{i\times j}} (−1)i+jMi×j we will get the cofactor of the element.

Answer 2

Step-by-step explanation:

Given :-

Sarita bought 2/5 metre of ribbon and Lalita 3/4 metre of ribbon.

To find:-

What is the total lenght of the ribbon they bought ?

Solution:-

Length of the ribbon bought by Sarita = 2/5 m

Length of the ribbon bought by Lalita = 3/4 m

Total length of the ribbon = (2/5)+(3/4)

LCM of 5 and 4 = 20

=> [(2×4)+(3×5)]/20

=>( 8+15)/20

=> 23/20

The total length is 23/20 m

Answer:-

The total length of the ribbon bought by both of them is 23/20 m