What is the difference between secondary development and primary development in underground mining

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Answer:

read 10th ncert ans is in that book

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Explain why a competent surveyor is always required to facilitate the advancement of tunnels, drifts, cross cuts and other underground workings?

Answer:

what are you trying to tell me I can't understand

Add 1 1/3 + (−5/6) using the number line.Select the location on the number line to plot the sum.
question img

Answer:

2

Step-by-step explanation:

11/3=3.66+(-.83)

= 3.66-.83

= 2.83

maths class 8 wat is the answer
question img

Step-by-step explanation:

We know that, sum of angles of a triangle = 180 degree

So, in triangle ABC we get

(x +10)d + (2x + 15)d + (3x +5)d = 180 d

=> (6x +30)d = 180 d

=> 6x = 180 - 30

=> 6x = 150

=> x = 150/6

=> x = 25

Therefore,the value of x is 25 //

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Light Co. had the following bank reconciliation at March

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