Question

fast plz class 10
maths chapter 4

Answer 1

Given that the output is doubled in last two years

Let the output before 2 years be x

Hence after two years it will be 2x

n = 2

A= P[1-rate/100]^n

Recall the formula,

⇒2x=x[1-rate/100]^2

⇒2=[1-rate/100]

⇒√2=[1-rate/100]

⇒1-rate/100=√2-1

⇒1.4142 -1 =0.4142

∴rate=41.42% ANS