Q1) option D)
Original BC : P1X1 + P2X2 = M
8X1 + 4X2 = 400
New BC : 8X1 + 8X2 = 400
THEN new BC rotates inwards , slope falls from 2 to 1
Q2) option B)
At eqm, MRS = P1/P2'
MRS = MU1/MU2 = X2/3X1
At new eqm, X2/3X1 = 8/8 = 1
X2 = 3X1
from BC : 8X1 + 8X2 = 400
Put, X2 = 3X1
8X1 + 24X1 = 400
32X1 = 400
X1' = 12.5
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