Question

Three boys start from the same point together their step measure 56cm,70cm and 63 respectivity at what distance from the starting point they will step together at came point

a)2310cm
b)2520cm
c)2530cm
d)2550cm​

Answer 1

LCM of 63,70,77

LCM=2×3×3×5×7×11=6930

Hence, the minimum distance each should cover so that all can cover the distance in complete steps is 6930 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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Answer 2

lcm of 56cm, 70cm and 63 cm = 2520 cm

so, b is the correct option