Question

at what rate percent will a sum of rupees 640 be compounded to rupees 774.40 in 2 years​

Answer 1

Step-by-step explanation:

774.40=640(1+r/100)²

774.40=640(1+r/100)²774.40/640=(1+r/100)²

774.40=640(1+r/100)²774.40/640=(1+r/100)²(1.1)²=(1+r/100)²

774.40=640(1+r/100)²774.40/640=(1+r/100)²(1.1)²=(1+r/100)²1.1=1+r/100

774.40=640(1+r/100)²774.40/640=(1+r/100)²(1.1)²=(1+r/100)²1.1=1+r/100r/100=1.1-1

774.40=640(1+r/100)²774.40/640=(1+r/100)²(1.1)²=(1+r/100)²1.1=1+r/100r/100=1.1-1r/100=0.1

774.40=640(1+r/100)²774.40/640=(1+r/100)²(1.1)²=(1+r/100)²1.1=1+r/100r/100=1.1-1r/100=0.1r=0.1*100

774.40=640(1+r/100)²774.40/640=(1+r/100)²(1.1)²=(1+r/100)²1.1=1+r/100r/100=1.1-1r/100=0.1r=0.1*100r=10%pa

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