# Mechanical Engineering - Workshop Technology - Discussion

### Discussion :: Workshop Technology - Section 2 (Q.No.5)

5.

For obtaining a cup of diameter 25 mm and height 15 mm by drawing, the size of the round blank should be approximately

 [A]. 42 mm [B]. 44 mm [C]. 46 mm [D]. 48 mm

Explanation:

No answer description available for this question.

 Jjp said: (Jan 10, 2014) D = Square root of ((d*d)+(4dh)) = 46.09.

 Gaurav said: (Nov 9, 2014) Blank volume = Cup volume. (pie*D^2/4)*t = pie*d*h*t+(pie*d^2/4)*t. D = blank dia. d = cup dia. h = cup height. t = thickness.

 Krunal Modi said: (Jul 25, 2015) Blank = (d^2+4dh)^1/2. = (25^2+4*25*15)^1/2. = (625+1500)^1/2. = 46.09.

 Sandeep Dicholkar said: (Sep 11, 2015) Since the thickness of the sheet is not given, how do you calculate?

 Devikiran said: (Jun 19, 2016) The Thickness of material gets canceled.

 Surajit said: (Sep 13, 2016) The thickness of the blank and the cup won't be same. Am I right?

 Sahil said: (Nov 5, 2016) What is the correct Formula? Please tell me.

 Loki said: (Dec 7, 2017) I am not understanding this, please explain clearly.

 S.Rao said: (Jan 9, 2018) Formula please. Explain it.

 Narayan said: (Apr 24, 2018) Blank dia = √{(d√) +(4dh)}.

 Rajasekhar said: (Apr 27, 2018) Please explain it with the correct formula.

 Ubong Sam said: (Jul 16, 2018) Here, how you got the square root? Please explain.

 Md Shahood Alam said: (Apr 27, 2019) We know the formula of blank dia is, D = π(d^2+4dh) Where, Blank dia (D)=? , Cup dia (d)=25mm, height (h)=15mm. So, D = π{(25*25)+(4*25*15)}. D = π(625+1500), D = 46.09, D = 46.

 Imthiyaz said: (Sep 9, 2019) How to solve it, can anyone explain?

 Gujjar said: (Nov 5, 2019) What is a drawing?