Question

answer the 13 th Q both or Q

Answer 1

13.
Sum(P) = 3500
R = 7%
T = 2 years.
S.I = P*R*T/100 = 3500*7*2/100 = 490 Rs.
A = P + S.I = 3500 + 490 = 3990 Rs.
Interest at the end of 2 yrs = 490 Rs.
Amount = 3990 Rs.

OR
Gain = 20%
S.P = 720
S.P = C.P*(100+P)/100
C.P = S.P*100/(100+P) = 720*100/120 = 600 Rs.
Hence, cost price = Rs.600
Hope it helps.