An experiment is conducted to measure the density of an object of unknown material as shown.

The mass of an object is measured using a weighing machine and it turns out to be$100 \mathrm{g}$. Calculate the density of the object (in $\mathrm{g}/\mathrm{cm}³$).

What is the volume of the following?

Find the area of the figures given below.

Complete the crossword puzzle using the hints given below.

Across
5. Device used to measure speed of automobiles.
Down
1. Device used to measure distance travelled, commonly fitted in vehicles
2. It is a tube similar to measuring jar, with a pinch-cock provided at the bottom.
3._____ is the mass per unit volume of a substance or object.
4. The amount of space occupied by a substance
5. Distance travelled per unit time