Correct Measurement of Length

If the radius of a sphere is doubled without changing its mass, then the density of the sphere is ____ times its original value.

A pile of identical one rupee coins is placed over a meter scale as shown in the figure. The thickness of a one rupee coin is _____.

Jenny wants to measure the height of her son. She asks her son to stand against a wall. Which picture shows the correct way of marking his height?

A student measures the length of his classroom four times using a stick.

Which measurement is likely to be wrong?

While measuring the length of a wooden box, the reading at one end is $1.5 \mathrm{cm}$ on a scale and the other end is $4.7 \mathrm{cm}$. What is the length of the wooden box?

Four pieces of wooden sticks $P, Q. R, S$ are placed along the length of $15 \mathrm{cm}$ long scale as shown in the figure. What is the average length of these sticks?

A piece of thread folded $6$ times is placed along a $15\mathrm{}\mathrm{c}\mathrm{m}$ long measuring scale as shown in the figure. The length of the thread is between

If your ruler does not show the marking of 1, 2 and 3 cm, how would you measure the length of an eraser?

Explain two methods those you can use to measure the length of a curved line.

What are the rules to be followed to make accurate measurement with scale?

You are provided three scales $A$, $B$ and $C$ as shown in figure to measure a length of $10 \mathrm{cm}$.

For the correct measurement of the length, you will use the scale

Which of the following figure shows the correct placement of a block along a scale for measuring its length?

Solve the following. (Mark $1$ for blue, $2$ for green, $3$ for red and $4$ for orange)

What is the length of the grids $1$, $2$, $3$ and $4$, if the length of each box of one grid is $0.7 \mathrm{cm}$?

Measure the length (in $\mathrm{cm}$) of the object.

You are provided three scales $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ as shown in the figure, to measure a length of $10 \mathrm{cm}.$

For the correct measurement of the length, you will use the scale:

The length of a dining table is $150 cm$, and the width is$100 cm$. A table sheet is required to cover the top of this table. What should be the length and width of the cover, if it hangs down about $10 cm$ from all the four sides?

While measuring the length of science book, the reading at one end is $3.5 \mathrm{cm}$ and at the other end is $25 \mathrm{cm}$. What is the length of the science book?

The correct measurement of the length card in figure shown below is:

Find out the length of the feather in the picture given below.

Match the following: