A) 6930cm
B) 6000cm
C) 7000cm
D) 6520cm
Correct Answer: A
Solution :
The minimum distance all boys should cover is the LCM of 63 cm, 70 cm and 77 cm.2 | 63, 70, 77 |
3 | 63, 35, 77 |
3 | 21, 35, 77 |
5 | 7, 35, 77 |
7 | 7, 7, 77 |
11 | 1, 1, 11 |
1, 1, 1 |
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