Q3. Three alarm clocks ring at intervals of 4, 12 and 20 minutes respectively. If
they start ringing together, after how much time will they next ring
together? [3M]
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Answer:
Length of the longest rod is 25 cm
Step-by-step explanation:
To find the length of the longest rod that can measure the dimensions of the room exactly, we have to find HCF.
L, Length = 8 m 50 cm = 850 cm = 2 × 5 × 5 × 17
B, Breadth = 6 m 25 cm = 625 cm = 5 × 5 × 5 × 5
H, Height = 4 m 75 cm = 475 cm = 5 × 5 × 19
HCF of L, B and H is 52 = 25 cm
Length of the longest rod = 25 cm
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