A railway half-ticket costs half the full fare plus a fixed reservation charge. One full and one half ticket cost Rs 216(f+(2f + r) = 216). A full ticket is Rs 144 (f=144). Use substitution to find the reservation charge r (in Rs).
Class 10Substitution MethodAlgebra — Systems of Equations
A2
B-1
C1
D0
Step-by-Step Solution
Substitute f=144:144+(2144 + r) = 216, 144+72+r=216,216+r=216,r=0. The reservation charge is Rs 0.
Answer: D) 0
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