Maths Class 5 Computation Operations

Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.

Two cyclists start cycling on a circular track from the same point but in opposite directions. One completes a round in 40 seconds and the other in 30 seconds. After how many seconds will they meet at the starting point?

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A 150 seconds
B 120 seconds
C 100 seconds
D 190 seconds

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Answer: B. 120 seconds

To find when both cyclists will be at the starting point together, find the LCM of 40 and 30.

LCM calculation: LCM = 2 × 2 × 2 × 3 × 5 = 8 × 3 × 5 = 24 × 5 = 120 They will meet at the starting point every 120 seconds

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Two cyclists start cycling on a circular track from the same point but in opposite directions. One completes a round in 40 seconds and the other in 30 seconds. After how many seconds will they meet at the starting point?

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