Express a velocity of 72 kilometers per hour in meters per second.
Answer and explanation
Correct answer: A. 20 m/s
- Step 1: Conversion factor from km/h to m/s: multiply by 5/18 (since 1,000 m / 3,600 s = 5/18). Step 2. Compute: 72 (5 / 18) = 4 5 = 20 m/s. Answer: 20 m/s. Why not the others: 25 m/s corresponds to 90 km/h; 18 m/s corresponds to 64.8 km/h; 15 m/s corresponds to 54 km/h.
Practise more Arithmetic, Number Systems and Percentages.
Free questions with an explanation for every one, and full timed Bangladesh Civil Service Preliminary Examination mock tests.
More Arithmetic, Number Systems and Percentages questions
- How many prime numbers exist between 1 and 50 inclusive?
- The product of two positive integers is 840, and their Highest Common Factor (HCF) is 4. What is their Least Common Multiple (LCM)?
- Which of the following fractions has the greatest numerical value: 3/5, 7/10, 11/15, or 4/5?
- An amount of 1,200 BDT is divided among three persons A, B, and C in the ratio 3 : 4 : 5. What is the monetary share of B?
- What is the compound ratio of the three simple ratios 2 : 3, 6 : 5, and 10 : 9?
- If the market price of sugar increases by 25%, by what percentage must a household reduce its consumption to keep total expenditure unchange…