my bag contains two book each of weight 3/7 kg and three folders each of weight 5/21 kg. what is the total weight in the back

Step-by-step explanation:

2 x 3 = 6 so 6/7 kg

5x 3 = 15/21 kg

6/7 x 3 = 18/21

18/21 + 15/21 = 23 / 21 kg OR 1 2/21 kg

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl