Question

the Length breadth and height of a room are 21 m 15 m and 18 m respectively. determine the longest tape which can measure the three dimensions of the room exactly.

Answer 1

Dear Student.

The length of the tape that would measure the three dimensional room exactly would be the HCF of three numbers.
21=3 x 7
15=3 x 5
18= 3 x 3 x 2
So the HCF would be 3
Hence the answer is 3 m.

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