Posted by **Anonymous** on Thursday, October 14, 2010 at 11:38am.

Metal discs for pet collars have a diameter of 4cm. Each disc is 0.1cm thick. How many discs can be made from 1000cm3 of metal?

- math -
**Reiny**, Thursday, October 14, 2010 at 11:53am
I don't like this question.

There is simple purely mathematical solution

volume of 1 disc = π(2^2)(.1) = .4π cm^3

so number of discs = 1000/(.4π) or 795.8

so they can make 795 discs

Logistically, this is a very ambiguous question

- is the 1000 cm^3 in a block of metal or in sheets?

- are the discs manufactured by pouring liquid metal into a mould ?

- are they stamped ? If so, is the scrap metal used again?

- arhhh! ....

## Answer This Question

## Related Questions

- Probability - A bag contains 5 white discs and 5 black discs. Two players draw ...
- Math (Probability) - Hassan has a bag which contains 20 coloured discs. He ...
- Math - A bag contains 8 white, 6 black and 4 red discs. They are selected at ...
- Physics - A pendulum is made of two discs, one with mass M and radius R and the ...
- Math - There are 40 students. THere are 6 who only like tape , 10 who like both ...
- Biomechanics - An 88.9 kg weight lifter is required to perform a snatch movement...
- Maths - A hollow spherical metal ball has internal radius 1cm. If the metal is 1...
- Mathematics - A cylindrical tube, open at both ends, is made of metal. The ...
- math - 6cm diameter discs are cut from a sheet 130cm long and 70cm wide.(a)How ...
- physics - A cylindrical tube open at both ends is made of metal. The internal ...

More Related Questions