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8Â years, 4Â months ago
The hourly percentage increase in number of bees in a colony increases by 10 percentage points every hour. In the first hour, the increase in number of bees is 20%. Find the effective increase in number of bees in 2nd hour, if there are 1248 more bees in the third hour when compared to second hour?
8Â years, 1Â month ago
let x be initial no. of bees
after 3 hours no. of bees will be= x*1.2*1.3*1.4
1248 more in third hour as compared to second
thus
x*1.2*1.3*1.4 - x*1.2*1.3=1248
x= 2000
1 hour - 2000*1.2 = 2400
2 hour - 2400*1.3 = 3120
effective increase in second hour= 3120-2400= 720
8Â years, 4Â months ago
let x be the initial number of bees. after 3 hours the number of bees will be x*1.2*1.3*1.4
number of bees after 2 hours will be x*1.2*1.3
the increase in the 3rd hour will be x*1.2*1.3*0.4=1248
x=1248/0.144
after 1 hour no.of bees= 10400
increase in no.of bees in 2 hour =10400*(1.3-1)=3120
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