# Math

Q.250 cm3(cube) of the liquid weighs 125 grams. find the weight of 1000 cm3(cube) of the liquid.

Q.The cost of a long distance call lasting 20 seconds was 23.40 at this rate what was the cost of a call lasting 6 minutes 30 seconds.

1. 👍 0
2. 👎 0
3. 👁 208
1. #1
to get this, we just use ratio and proportion.
let x = weight of 1000 cm^3 liquid.
250 cm^3 : 125 g = 1000 cm^3 : x g
thus we can rewrite this as,
250/125 = 1000/x
solving for x,
2 = 1000/x
2x = 1000
x = 500 grams

#2
here, we also use ratio and proportion. first we convert 6 min and 30 seconds to seconds:
6 min = 360 seconds
thus 360 + 30 = 390 seconds
let x = cost of 390 second call
20 : 23.4 = 390 : x
thus,
20/23.4 = 390/x
0.855 = 390/x
x = 390/0.855
x = 456.3

hope this helps~ :)

1. 👍 0
2. 👎 0
posted by Jai

## Similar Questions

1. ### Physical Science

A 2.9-kg pile of aluminum ( = 2.70 g/cm3) cans is melted, and then cooled into a solid cube. What is the volume of the cube? a. 931 cm3 b. 1074 cm3 c. 1365 cm3 d. 889 cm3 Thank you!

asked by Wanda on June 19, 2011
2. ### Math

A cube with a volume of 216 cm3 is cut down to a pyramid with the same size base and the same height as the original cube. What is the volume of the pyramid? A.108 cm3 B.94 cm3 C.72 cm3 D.52 cm3

asked by Kaylie on July 5, 2012
3. ### Chemistry

The density of aluminum is 2.70g/cm3. If a cube of aluminum weighs 13.5 grams whatis the length of the edge of the cube. I need help with the formula to figure this one out.

asked by Jessica on June 1, 2011
4. ### Geometry

32. What is the maximum volume of a square pyramid that can fit inside a cube with a side length of 18cm? 5,832 cm3 2,916 cm3 1,944 cm3 972 cm3

asked by Becky on May 13, 2016
5. ### Math Help!

Use Euler's Formula to find the missing number. Vertices: 13 Edges: 26 Faces: ? A. 14 B. 15****? C. 16 D. 17 What is the maximum volume of a square pyramid that can fit inside a cube with a side length of 24 cm? A. 2,304 cm3 B.

asked by Lilyy2 on May 20, 2016
6. ### Physics

A cube of wood with a density of 0.780 g/cm3 is 10.0 cm on each side. When the cube is placed in water, what buoyant force acts on the wood? (ρw = 1.00 g/cm3) a. 5.00 N b. 6.40 N c. 7.65 N d. 7.65 x 10^3 N

asked by George on December 19, 2011
7. ### Medical physics

A silver cube (density of silver is 10 g/cm3) with side length of 3 cm weighs more than an aluminium cube (density of aluminium is 2.96 g/cm3) with side length of 4 cm. The cubes are each suspended by a string and allowed to be

asked by JAMES on March 21, 2015
8. ### geometry

the volume of a cube is 125 cm3. What is the length of each side?

asked by desperate on February 8, 2012
9. ### Science-physics

A bottle weighs 35g when empty,95g when filled with water and 119g when filled with an organic liquid. What is the capacity of the bottle: A-60cm cube B-84cm cube C-130cm cube D-154cm cube

asked by Matthew on October 26, 2016
10. ### Chemistry

What volume of a liquid having a density of 4.55 g/cm3 is needed to supply 10.47 grams of that liquid? Answer in cm3.

asked by Andy on October 12, 2013

More Similar Questions