The graph below shows the length of two springs when an object was hung on each spring. Find the length of each spring that was stretched for every 10g of the object.

A

A: 0.7cm B: 0.4cm

B

A: 0.8cm B: 0.5cm

C

A: 0.9cm B: 0.6cm

D

A: 0.10cm B: 0.7cm

E

None of the above

Sorry. Please check the correct answer below.

Spring A: 0.9cm. Spring B: 0.6cm $\rightarrow$ A 220g $\rightarrow$ 20cm – 2cm = 18cm, divide by 20 = A 10g $\rightarrow$ 0.9cm, divided by 30 $\rightarrow$ B 300g $\rightarrow$ 20cm – 2cm = 10cm, B 10g $\rightarrow$ 0.6cm

Spring A: 0.9cm. Spring B: 0.6cm $\rightarrow$ A 220g $\rightarrow$ 20cm – 2cm = 18cm, divide by 20 = A 10g $\rightarrow$ 0.9cm, divided by 30 $\rightarrow$ B 300g $\rightarrow$ 20cm – 2cm = 10cm, B 10g $\rightarrow$ 0.6cm

The figure below is made up of 2 overlapping squares. The area of the shaded part is 44cm$^2$. What is the length of the smaller square?

A rectangular tank was 23cm long. 37cm wide and had a height of 10cm Jake managed to fit a maximum of 90 identical cubes into the tank and cover it with a lid. What is the length of one side of each cube?

The length of Rod A is $\frac{1}{2}$ of the length of Rod B and the length of Rod B is $\frac{1}{3}$ of the length of Rod C and $\frac{1}{4}$ of the length of Rod D. What fraction of the total length of the 4 rods is C?

Billy used a piece of string to hold some colored flags, each 10cm wide, as shown in the diagram below. Each flag was strung 20cm apart from one another. Billy also gave an allowance of 40cm each before the first flag and after the last. If the length of the string used was 13.2m, how many flags did he string altogether?