Read the distance and time graph of a car and find: a. Distance travelled from E to F b. Speed of the car between 20-40 seconds c. When is the speed of the car zero.

Question 1: Volume of cylinder (height 30 cm, diameter 20 cm)

Step 1: Formula: $V = \pi r^2 h$

Diameter = 20 cm, so radius $r = \frac{20}{2} = 10$ cm.
Height $h = 30$ cm.

Step 2: Substitute:
$V = \pi (10)^2 (30) = \pi \times 100 \times 30 = 3000\pi$ cm³.

3000\pi \text{ cm^3}

Question 2.1: Diagonal of cuboid (x=4 cm, y=5 cm, z=3 cm)

Step 1: Formula: $d = \sqrt{x^2 + y^2 + z^2}$

Step 2: Substitute: