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akshay7423@gmail.com

· started a discussion

· 1 Months ago

DISGUSTED (Question: 185282.0 )

I WILL NOT SUGGEST ANYONE TO BUY THIS . WRONG OPTIONS.WRONG QUESTIONS. WASTING OUR TIME AND MAKING US FRUSTATED.

Question:
From a solid cylinder of height 15 cm and radius of the base 8 cm a cone of same height and same base is removed. The volume of the remaining solid is –
Options:
A) 240\(\pi\) cm3
B) 5280\(\pi\) cm3
C) 640\(\pi\) cm3
D) 360\(\pi\) cm3
Solution:

Required volume = volume of cylinder - volume of cone


= pi r^2 h - 1/3 pi r^2 h


= 2/3 pi r^2 h


Now, put r=8 and h=15


so, required volume =  2/3 pi 8^2 15 = pi * 64 *10 = 640pi cm^3

Anuj Singh

· commented

· 1 Months ago

(22/7*8*8*15) - (1/3*22/7*8*8*15) =640*22/7 answer

22/7 means pie

Knowledge Expert

· commented

· 1 Months ago

Given option is correct, please simplify it properly.

See sol:

Required volume = volume of cylinder - volume of cone

= pi r^2 h - 1/3 pi r^2 h

= 2/3 pi r^2 h

Now, put r=8 and h=15

so, required volume = 2/3 pi 8^2 15 = pi * 64 *10 = 640pi cm^3
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