A hollow garden roller 63 cm wide with a girth of 440 cm is made of iron 4 cm thick. The volume of the iron used is

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03 Apr 2015 Volume and surface areas A hollow garden roller 63 cm wide with a girth of 440 cm is made of iron 4 cm thick. The volume of the iron used is: OPtion
1) 56372 cm^3
2) 58342 cm^3
3) 58752 cm^3
4) 59354 cm^3
5) 54982 cm^3
6) 52243 cm^3
7) 57636 cm^3
8) 60564 cm^3
9) 56544 cm^3
10)None of these; Correct Option: 3 Best Solution (5)

Ankit 9 years AGO

Radius of outer cover=2*pi*r=440
r=70
Inner radius=66(70-4)
Volume of iron=107712

Like? Yes (100) | No (21)

Anuj Rai 9 years AGO

we know that roller is in the form of cylinder so calculating its volume using pie*r^2*h. on opening the cylinder a rectangle. so on solving it we will get the volume of iron used in it

Like? Yes (20) | No (26)

Anuj Rai 9 years AGO

as the volume of cylinder is pie*radius^2*height.
put height=63 and calculate the volume of iron used

Like? Yes (10) | No (27)

Supriya Mondal 9 years AGO

After calculating we get the answer is 58752 cm^3

Like? Yes (18) | No (38)

SUSHANT KUMAR 9 years AGO

2pi R=440
so R= 70
t=4
h=63
r=66
so volume of iron used= pi*h*[R^2-r^2]
=58752

Like? Yes (15) | No (39)

Dimple

India

Punjab

Time: 00:01:33

Points

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A hollow garden roller 63 cm wide with a girth of 440 cm is made of iron 4 cm thick. The volume of t

M4maths Previous Puzzles

03 Apr 2015 Volume and surface areas