Q1: For laying a sewer line in a trench of 2 m width, an offset line is marked on the ground parallel to the given centre line at a distance of

ANS:D - 160 cm

To determine the distance at which an offset line is marked parallel to the given centerline for laying a sewer line in a trench of 2 m width, we need to consider the half-width of the trench. Given:

• Trench width = 2 m

The half-width of the trench would be half of 2 m, which is 1 m. Now, let's convert 1 m to centimeters: 1 meter=100 centimeters1meter=100centimeters So, the offset line should be marked at a distance of 100 cm100cm from the centerline, parallel to the given centerline. Therefore, the correct option is 100 cm.