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Answer 1

Answer:

1) 120

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Solution :-

Given length of pieces - 45 cm, 75 cm and 81 cm

To find the length of the rope we have to find the L.C.M. of 45, 75 and 81.

     

    __________________

3  |  45, 75, 81

    |________________      

3  |  15, 25, 27

    |________________

3  |    5, 25,  9

    |________________

3  |    5, 25,  3

    |________________

5  |    5, 25,  1

    |________________

5  |    1,  5,   1

    |________________

    |    1, 1,   1

    |

L.C.M. = 3*3*3*3*5*5

= 2025 cm

3)We need to find the smallest multiple of 3,4,6,8  .It is 24

4)answer in the picture.(The greatest number that divides 210, 252 and 294 is 42)

Explanation:

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