Advertisement Remove all ads

The Present Population of a Town is 1, 15,200. If It Increases at the Rate of 6 2 3 0/O per Annum 1 Find Its Population 2 Years Ago. - Mathematics

Sum

The present population of a town is 1, 
0/o per annum 1, 15,200. If it increases at the rate of `6 2/3` % per annum find  
Its population 2 years ago.

Advertisement Remove all ads

Solution

Vn = ? ; V0 = 115200 ; r = `6 2/3` % = `20/3` % ; t = 2 years

`"V"_"n" = "V"_0  (1 + "r"/100)^"n"`

`"V"_"n" = 115200 (1 - 20/(100 xx 3))^2`

`"V"_"n" = 1, 15, 200 xx 0.933333 xx 0.933333`

Vn = 1,00,352 

The population 2 years ago was = 1, 00,352 

  Is there an error in this question or solution?
Advertisement Remove all ads

APPEARS IN

Frank ICSE Class 10 Mathematics Part 2
Chapter 1 Compound Interest
Exercise 1.7 | Q 5.2 | Page 25
Advertisement Remove all ads
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×