34. In how many years a principal amount will be 3 times at 10% simple rate of interest / 10% साधारण ब्याज दर पर एक मूलधन कितने वर्षों में 3 गुना होगा
12 yrs
15 yrs
20 yrs
22 yrs
12 yrs
15 yrs
20 yrs
22 yrs
Answer / उत्तर -20 yrs
explanation / स्पष्टीकरण :-
we know that
SI = ptr /100
here
p=principle=1
A=total amount=3 (ATQ)
then SI = 3-1 =2
R= rate of intrest=10
find time T=?
put the values in equation (1)
SI= ptr /100
2 = 1xTx 10 /100t = 2 x 10
T=200/10=20
therefore T= 20 year's
explanation / स्पष्टीकरण :-
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