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At a book store, “MODERN BOOK STORE” is flashed using neon lights. The words are individually flashed at intervals of 2 1 / 2 , 4 1 / 4 , 5 1 / 8 seconds respectively, and each word is put off after a second. Find the least time after which the full name of the bookstore can be read again?



At a book store, “MODERN BOOK STORE” is flashed using neon
lights. The words are individually flashed at intervals of 21/2,
41/4, 51/8 seconds respectively,
and each word is put off after a second. Find the least time after which the
full name of the bookstore can be read again?



Grade:9

1 Answers

Ravi
askIITians Faculty 69 Points
9 years ago
The difference between individual flashing of words takes 31/2, 5 1/4, 6 1/8seconds respectively. A whole number LCM of the 3 time intervals would give the least timeafter which the full name of the bookstore can be read again.

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