Algebra, NAPX-F4-CA28

Question

Moonjava stacks up identical cups.



A stack of 3 cups is 18 cm high.

A stack of 6 cups is 28.5 cm high.

What height will a stack of 12 identical cups be?

Worked Solution

Height difference between 3 cups and 6 cups

= 28.5 − 18

= 10.5 cm


⇒ Each cup adds 10.5÷3=3.510.5 ÷ 3 = 3.5 cm.

Since 6 cups are 28.5 cm high,

∴\therefore Height of 12 cups

=28.5+(6×3.5)=28.5+(6×3.5)

= {{{correctAnswer}}}

Variant 0

DifficultyLevel

698

Question

Moonjava stacks up identical cups.



A stack of 3 cups is 18 cm high.

A stack of 6 cups is 28.5 cm high.

What height will a stack of 12 identical cups be?

Worked Solution

Height difference between 3 cups and 6 cups

= 28.5 − 18

= 10.5 cm


⇒ Each cup adds 10.5÷3=3.510.5 ÷ 3 = 3.5 cm.

Since 6 cups are 28.5 cm high,

∴\therefore Height of 12 cups

=28.5+(6×3.5)=28.5+(6×3.5)

= 49.5 cm

Question Type

Multiple Choice (One Answer)

Variables

Variable nameVariable value
correctAnswer
49.5 cm

Answers

Is Correct?Answer
x

72 cm

x

57 cm

x

51.5 cm

✓

49.5 cm

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