A framed structure is perfect if it contains members equal to, where n = number of joints in a frame.

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RRB Paper · Accepted Answer

Perfect frame: If the number of members is just sufficient to keep the frame in equilibrium without a change in its shape under the action of external load. The perfect frame satisfies the following equation m = 2n − 3 where m = number of members in the frame n = number of joints in the frame In a Perfect frame, all of its support reactions and member forces can be calculated using only the equations of static equilibrium.

A framed structure is perfect if it contains members equal to, where n = number of joints in a frame.

n ? 1

2n ? 3

2n ? 1

n ? 2

The correct answer is `No. 2: 2n ? 3`

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A framed structure is perfect if it contains members equal to, where n = number of joints in a frame.

n ? 1

2n ? 3

2n ? 1

n ? 2

The correct answer is No. 2: 2n ? 3

The correct answer is `No. 2: 2n ? 3`