Question

Ek particular price ko ek particular rate SE 4 year ka simple interest hai 160 RS. Agar uske double price ko usi rate SE 2 years ka simple interest Kya hoga
Answer is 160 but how??

Answer 1

In first case let p=100


Si=pxrxt/100

160=100xrx4/100

R=160*100/100*4

R=40%

Now in second case

The principal double

P=200

R=40%( Take same rate of interest given in question)

T=2yr

Si=pxrxt /100

Si=200x40x2/100

Si=2x40x2

Si=160


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