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October 20, 2014

October 20, 2014

Posted by **Zayn** on Sunday, September 30, 2012 at 7:03am.

A.) How many pails of cement was used at first?

B.) How many pails of sand was used?

- Maths -
**Reiny**, Sunday, September 30, 2012 at 8:45amoriginal amount of cement = x

original amount of sand = 2x

new amount of cement = x + 8

new amount of sand = 2x

(x+8)/(2x) = 5/2

cross-multiply

10x = 2x + 16

8x = 16

x = 2

A) original amount of cement = 2 pails

B) original amount of sand = 4

check:

new amount of cement = 2+8=10

new amount of sand = 4

10: 4 = 5:2

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