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Paladinen [302]

3 years ago

8

Stoplight A changes color every 42 seconds and Stoplight B changes color every 30 seconds. Both stoplights changed color 10 seco

nds ago. After how many seconds will the stoplights change color at the same time again *
200
190
210
180

1 answer:

LenaWriter [7]3 years ago

7 0

Answer:

210

Step-by-step explanation:

LCM of 42sec and 30 sec=210 sec

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