# Two unknown resistance X and Y are connected to left and right gaps of a meter bridge and the balancing point is obtained at 80 cm from left. When a 

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Two unknown resistance X and Y are connected to left and right gaps of a meter bridge and the balancing point is obtained at 80 cm from left. When a 10Omega resisance is connected in parallel to x, balance point is 50 cm from left. The values of X and Y respectively are
A. 40Omega, 9Omega
B. 30Omega, 7.5 Omega
C. 20Omega, 6 Omega
D. 10Omega, 3Omega

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(X)/(Y)=(80)/(100-80) …(i)
((10x)/(10+x))/(Y)=(50)/(50)` .(ii)