In a certain country, a person is born every 4 second and person dies every 10 seconds . Therefore , the birth and death rates account for a population growth rate of one person every--

A 6 seconds
B 6.5 seconds
C 6.67 seconds
D 14 seconds

Correct Answer: 6.67 seconds

LCM of 4 & 10 is 40. 10 persons are born in every 40 seconds. 4 persons die every 40 second. Population growth rate = 6 persons every 40 seconds = 1 person every (40/6 = 6.67) seconds
Bissoy MCQ
#গণিত #Trust Bank Ltd #Trust Bank Ltd - Management Trainee Officer - 06.12.2011

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