Chile · Grado 9 · Practice Sheet 31
Sheet code: CHILE-G9-S31 · 20 questions
- 1.
A bag has 29 equally likely marbles, of which 7 are red. Find the probability of drawing a red marble (to 3 d.p.).
- 2.
A circle has a radius of 8 cm. Find its area. (Use π ≈ 3.14159)
- 3.
A bag has 18 equally likely marbles, of which 13 are red. Find the probability of drawing a red marble (to 3 d.p.).
- 4.
An object has mass 36.4 g and volume 14 cm³. Find its density.
- 5.
A train moves at 33 km/h for 1.5 hours. How far does it travel?
- 6.
$144 is shared in the ratio 1 : 3. Find each share.
- 7.
$4,300 is invested at 10% simple interest per year for 2 years. Find the interest earned.
- 8.
An object has mass 61.6 g and volume 11 cm³. Find its density.
- 9.
A current of 1.3 A flows through a 10 Ω resistor. Find the voltage across it.
- 10.
Solve for x: 8x + 4 = 76.
- 11.
A force of 76 N acts on an area of 5.6 m². Find the pressure.
- 12.
A bag has 26 equally likely marbles, of which 25 are red. Find the probability of drawing a red marble (to 3 d.p.).
- 13.
A device runs at 129 V drawing 1.2 A. Find its power consumption.
- 14.
A current of 2.9 A flows through a 49 Ω resistor. Find the voltage across it.
- 15.
An object has mass 58.8 g and volume 7 cm³. Find its density.
- 16.
A cylinder has radius 13 cm and height 14 cm. Find its volume. (π ≈ 3.14159)
- 17.
An object has mass 56.7 g and volume 21 cm³. Find its density.
- 18.
$2,600 is invested at 10% simple interest per year for 4 years. Find the interest earned.
- 19.
A train moves at 46 km/h for 3.6 hours. How far does it travel?
- 20.
An object has mass 27 g and volume 18 cm³. Find its density.
© FormulaWon — formulawon.app · Answers & step-by-step working available on the solutions sheet.