Question

8000 blood donors were registered with a charitable hospital. Some student organisations started mobilizing people for this noble cause. As the result the number of donors registered increased at the rate of 20% per half year. Find the total number of new registrants during 1 1/2

Answer 1

20%of8000
100×20÷8000
1600

Answer 2

Hey bro!


Here is yr answer
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No. of donors registered = 8000

rate of increase of no. of donors per half year = 20%


So the no. of new registrations after 6 months (1/2 yr) = 20/100 × 8000
=1600

The total no. of registrations after 1/2 year = 1600+8000
=9600

Then the no. of new registrations after 1 year = 1600 + 20/100 × 9600
= 1600 + 1920
=3520


Total no. of registrations after 1 year = 3520+8000
=11520

The no. of new registrations after 1 1/2 years = 3520+20/100×11520
=3520+2304
=5824



Therefore, the no. of new registrations after 1 1/2 years = 5824




Hope it hlpz...