Related Questions

If the population of a certain country increases at the rate of one person every 15 seconds , by how many persons does the population increase in 20 minutes ?
A 80
B 100
C 150
D 240
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
In a certain country, a person is born in every 5 seconds and a person dies every 13 seconds. Therefore the birth and death and death rates account for a population growth rate of one person every-
A 0.123sec
B 9sec
C 8sec
D 8.125sec
In a certain country a person is born every 7 seconds and a person dies every 13 seconds. Therefore, the birth and death rates account of a population growth rate of one person every-0
A 4.5 seconds
B 6 seconds
C 15.17 seconds
D 20 seconds
In a certain country. A person is born every 7 seconds and a person dies every 10 seconds. Therefore, the birth and death rates account for a population growth rate of one person every---
A 4.5seconds
B 6 seconds
C 15.17 seconds
D 20 seconds
In a certain country, a person is born every 7 seconds and a person dies in every 13 seconds. Therefore, the birth and death rates account for a population growth rate of one person every----
A 4.5 seconds
B 6 seconds
C 15.17 seconds
D 20 seconds
In a certain country, a person is born every 5 seconds and a person dies every 13 seconds, Therefore the birth and death rates account fora population growth rate of one person every---
A 0.123sec
B 9 sec
C 8 sec
D 8.125 sec
একজন চাকরিজীবীর আয় ও ব্যয়ের অনুপার ২০ঃ ১৫ হলে, তার মাসিক সঞ্চয় আয়ের শতকরা কত অংশ?
A ৩০%
B ১৫%
C ২০%
D ২৫%
একটি ট্রান্সফরমারের প্রাইমারি ও সেকেন্ডারি তারের ঘূর্ণনের অনুপাত 20ঃ 1 এবং সেকেন্ডারিতে 20 omega রোধ লাগানো আছে। যদি প্রাইমারিতে 220 V প্রয়োগ করা হয় তাহলে এর মধ্যে বিদ্যুৎ প্রবাহ হবে-
A 0.55 A
B 27.5 mA
C 27.5 A
D 5.5 mA
John, Jack, Joseph and Jordan participated in a running race. Only the winner finished the race in 10 minutes. Which two pieces of information can tell you who the winner was? (i) John finished the race in 16 minutes . (ii) Joseph finished the race earlier than Jack by 2 minutes. (iii) Jack finished the race later than Jordan by 4 minutes. (iv) Jordan finished the race earlier than John by 6 minutes. (v) John finished the race later than Joseph by minutes.
A I and II
B I and IV
C II and III
D II and V

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