15-1. A 100-ft grid is located over an area that measures 800 ft in the north-south directionand 800 ft in the east-west direction. The southwesterly corner is designated A-1 andthe southeasterly corner is designated I-1. The northwesterly corner is designated A-9and the northeasterly corner is designated I-9. Elevations are obtained at the grid pointsusing a total station instrument, rounded off to the nearest foot. These are tabulated asfollows:37537236636035435034032230231236536483723723703683623613397366365365366.3623613473193593283286.363353350360362350347361340335343352350338334436034432932833733932532132133603433203173183183133123123083023033233262358343316310303291340B1353318310303297292ACDF G HPlot a grid to a scale of 1 in. = 200 ft and draw in 10-ft contour lines.

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Answered: orner is

Engineering

Mechanical Engineering

orner is

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter8: Centroids And Distributed Loads

Section: Chapter Questions

Problem 8.73P

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Question

15-1. A 100-ft grid is located over an area that measures 800 ft in the north-south direction
and 800 ft in the east-west direction. The southwesterly corner is designated A-1 and
the southeasterly corner is designated I-1. The northwesterly corner is designated A-9
and the northeasterly corner is designated I-9. Elevations are obtained at the grid points
using a total station instrument, rounded off to the nearest foot. These are tabulated as
follows:
375
372
366
360
354
350
340
322
302
312
365
364
8
372
372
370
368
362
361
339
7
366
365
365
366.
362
361
347
319
359
328
328
6.
363
353
350
360
362
350
347
361
340
335
343
352
350
338
334
4
360
344
329
328
337
339
325
321
321
3
360
343
320
317
318
318
313
312
312
308
302
303
323
326
2
358
343
316
310
303
291
340
B
1
353
318
310
303
297
292
A
C
D
F G H
Plot a grid to a scale of 1 in. = 200 ft and draw in 10-ft contour lines.

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