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Question

Number of photographs required to cover an area 40km × 30 km, if the scale is 1 in 15000 and the format is 300 mm × 300 mm (take longitudinal overlap pl as 60% and the side lap pw as 30)%, is _______

A
264
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B
232
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C
178
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D
162
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Solution

The correct option is A 264
The numbers of photographs required are:-

N=L1(1pl)lS+1×W1(1pw)WS+1=⎜ ⎜ ⎜ ⎜ ⎜ ⎜ ⎜40×103⎜ ⎜10.6⎟ ⎟×0.3(115000)+1⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥+⎜ ⎜ ⎜ ⎜ ⎜ ⎜ ⎜30×103⎜ ⎜10.3⎟ ⎟×0.3(115000)+1⎥ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥

=24×11=264

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