Qualification > Math
Maths doubt ~~
sameer210394:
A cylindrical glass has a radius of 4 cm and a height of 6 cm.
A large cylindrical jar full of water is a similar shape to the glass.
The glass can be filled with water from the jar exactly 216 times.
Work out the radius and height of the jar.
i got the answers as r = 24 & h=36
but the mark scheme says the answer is r=14, h=42.
wat is the method to solve it correctly.
astarmathsandphysics:
--- Quote from: sameer210394 on October 27, 2009, 04:33:05 pm ---A cylindrical glass has a radius of 4 cm and a height of 6 cm.
A large cylindrical jar full of water is a similar shape to the glass.
The glass can be filled with water from the jar exactly 216 times.
Work out the radius and height of the jar.
i got the answers as r = 24 & h=36
but the mark scheme says the answer is r=14, h=42.
wat is the method to solve it correctly.
The volume of the har is 216 times the volume of the glass
so all the lengths on the hjar are cube root(216)=6 times the lengths on the glass
radius is 24 and height=36
--- End quote ---
astarmathsandphysics:
I saw this question before. Which papaer is it from?
wassup:
--- Quote from: sameer210394 on October 27, 2009, 04:33:05 pm ---A cylindrical glass has a radius of 4 cm and a height of 6 cm.
A large cylindrical jar full of water is a similar shape to the glass.
The glass can be filled with water from the jar exactly 216 times.
Work out the radius and height of the jar.
i got the answers as r = 24 & h=36
but the mark scheme says the answer is r=14, h=42.
wat is the method to solve it correctly.
--- End quote ---
ur ans. is correct acc. 2 me. u must hav seen d wrong mark scheme.
sameer210394:
--- Quote from: astarmathsandphysics on October 27, 2009, 04:44:29 pm ---I saw this question before. Which papaer is it from?
--- End quote ---
maths paper 2 may/june- question 10)
0580/22/M/J/08
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