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1 point
11. Three persons a, b, c start walking around a circular field. A complete
one round in 7 mins and b complete one round in 8 mins and c complete in
10 mins. Find after running how much time all three meet together?
0 260
O 250
O 90
280​

Answer 1

Step-by-step explanation:

MATHS

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Asked on December 26, 2019 by

Bavana Mathews

A,B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 seconds, B in 308 seconds and C in 198 seconds, all starting the same point. After what time will they again at the starting point ?

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ANSWER

A complete his round in 252 seconds

B completes his round in 308 seconds

C completes his round in 198 seconds

They will again at starting together after,

LCM of 252,308 and 198

252=2×2×3×3×7

308=2×2×7×11

198=2×3×3×11

Required LCM =2×2×3×3×7×11=2772 seconds =46 minutes 12 seconds.