ISAT Quantitative Reasoning with Units 5

Question 1

A car engine produces 150 kilowatts of power. How many horsepower is this? (1 hp ≈ 0.746 kW)

Accepted Answer

approximately 201 hp

Answer

150 ÷ 0.746 ≈ 201 hp.

Question 2

A storage tank is cylindrical with a radius of 3 m and a height of 5 m. If 1 m³ = 1,000 liters, approximately how many liters can it hold? (π ≈ 3.14)

Accepted Answer

141,300 L

Answer

V = 3.14 × 3² × 5 = 141.3 m³ × 1,000 = 141,300 L.

Question 3

A worker earns $18.50 per hour and works 37.5 hours per week. What is the annual salary assuming 52 working weeks?

Accepted Answer

$36,075

Answer

$18.50 × 37.5 × 52 = $36,075.

Question 4

A weather station records a temperature drop of 18°F overnight. What is this change in degrees Celsius? (ΔC = ΔF × 5/9)

Accepted Answer

10°C

Answer

18 × 5/9 = 10°C change.

Question 5

An object accelerates uniformly from 0 to 90 km/h in 10 seconds. What is its acceleration in m/s²?

Accepted Answer

2.5 m/s²

Answer

90 km/h = 25 m/s; 25 m/s ÷ 10 s = 2.5 m/s².

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