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∵ Final Amount = Rs.[2800 x (1 + 10/100) x (1 +5/100)]
= Rs. [ 2800 x 11/10 x 21/20 ]
= Rs. 3234
∵ Final Amount = Rs.[2800 x (1 + 10/100) x (1 +5/100)]
= Rs. [ 2800 x 11/10 x 21/20 ]
= Rs. 3234
∴ Required C.I. = Rs.(3234 - 2800) = Rs .434
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Amount = Rs. 7500(1 + 4/100)^{2}
= Rs. 7500 x 26/25 x 26/25
= Rs .8112
Amount = Rs. 7500(1 + 4/100)^{2}
= Rs. 7500 x 26/25 x 26/25
= Rs .8112
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Let the principal be P. Then,
∵ P(1 +10/100)^{2} - P =420
⇒ P(121 - 100/100) =420
⇒ P = Rs. 2000
Let the principal be P. Then,
∵ P(1 +10/100)^{2} - P =420
⇒ P(121 - 100/100) =420
⇒ P = Rs. 2000
∴ Requared S.I.= Rs.(2000 x 2 x 10)/100
= Rs. 400
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Compound interest = P {(1 + r/100)^{t} - 1}
= 10105 { (1 +10/100)^{3} - 1}
Compound interest = P {(1 + r/100)^{t} - 1}
= 10105 { (1 +10/100)^{3} - 1}
=10105 {(11/10)^{3} - 1}
=10105 {1331/1000 - 1}
=10105(331/1000)
= 3344.755
= Rs. 3300(app.)
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From question it is clear that the simple interest of rupees 225 for one year is 238.50 - 225.
From question it is clear that the simple interest of rupees 225 for one year is 238.50 - 225.
So Rate = (simple interest x 100 )/( time x principle)
= {(238.50 - 225) x 100}/(225 x 1) % = 6%