In a church choir loft two parallel walls are 588 m apart, Ask an Expert

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In a church choir loft, two parallel walls are 5.88 m apart. The singers stand against the north wall. The organist faces the south wall, sitting 0.619 m away from it. So that she can see the choir, a flat mirror 1.147 m wide is mounted in the south wall, straight in front of the organist. What width of the north wall can she see? Answer in units of m

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