Light glows for every 18 seconds . How many times did it between 1:57:58 and 3:20:47 am
Choices:
A) 281 B) 277 C) 283 D) 384 E) 385
the diff in sec between 1:57:58 and 3:20:47 is 4969 sec, 4969/18 = 276.   so total 277 times light ll glow   ANSWER:277
<result>B</result>
Light glows for every 18 seconds . How many times did it between 1:57:58 and 3:20:47 am