Answer :
To find the length of the longest rod that can measure the dimensions of the room exactly, we have to find HCF.
Length, L = 8 m cm = 850 cm = 21 × 52 × 17
Breadth, B = 6 m 25 cm = 625 cm = 54,
Height, H = 4 m 75 cm = 475 cm 52 × 19
⇒ HCF of L, Band H is 52 = 25 cm.
⇒ Length of the longest rod = 25 cm
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