Question
5. How many times does your heart beat in a day if it beats 70 times per mil 6. The cost of breakfast cereal is R35 for 1 kg . Calculate how much 25 kg of breakfast cereal will cost. Five litres of paint costs R575. Work out the cost of fifteen litres of paint. If you cycled for 3 hours and travelled 54 km , calculate your average spe If oil costs \( \$ 95 \) per barrel and \( \$ 1=\mathrm{R} 8 \), how much does a barrel of oil cost in a car travels a distance of 50 km in 30 minutes. What is its average
Ask by Weaver Harper. in South Africa
Feb 15,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
1. **Heartbeats in a Day**: 100,800 beats.
2. **Cost of 25 kg Breakfast Cereal**: R875.
3. **Cost of 15 Litres of Paint**: R1,725.
4. **Average Speed When Cycling**: 18 km/h.
5. **Cost of a Barrel of Oil in Rand**: R760.
6. **Average Speed of the Car**: 100 km/h.
Solution
Below are the calculations and answers step by step:
1. Heartbeats in a Day:
• The heart beats 70 times per minute.
• In 1 hour there are 60 minutes, so beats per hour = 70 × 60 = 4,200.
• In 1 day (24 hours) beats = 4,200 × 24 = 100,800.
• Answer: 100,800 beats.
2. Cost of 25 kg Breakfast Cereal:
• Given cost is R35 per kg.
• Cost for 25 kg = 25 × R35 = R875.
• Answer: R875.
3. Cost of 15 Litres of Paint:
• Given 5 litres cost R575.
• The cost per litre = R575 ÷ 5 = R115 per litre.
• Cost for 15 litres = 15 × R115 = R1,725.
• Alternatively, since 15 litres is three times 5 litres, cost = 3 × R575 = R1,725.
• Answer: R1,725.
4. Average Speed When Cycling:
• Distance travelled = 54 km in 3 hours.
• Average speed = 54 km ÷ 3 hours = 18 km/hour.
• Answer: 18 km/h.
5. Cost of a Barrel of Oil in Rand:
• Oil costs USD 95 per barrel.
• The exchange rate is $1 = R8.
• Cost in rand = 95 × R8 = R760.
• Answer: R760 per barrel.
6. Average Speed of the Car:
• The car travels 50 km in 30 minutes.
• Convert 30 minutes to hours: 30 minutes = 0.5 hours.
• Average speed = 50 km ÷ 0.5 hours = 100 km/hour.
• Answer: 100 km/h.
Answered by UpStudy AI and reviewed by a Professional Tutor
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Beyond the Answer
Your heart works tirelessly, beating around 70 times per minute. This means that in a day (approximately 1,440 minutes), your heart beats about 100,800 times! That's right—your heart is like a personal drummer, keeping time for every exhilarating moment you experience. When budgeting for breakfast cereal, consider that 25 kg would cost R875. Just multiply the cost of 1 kg (R35) by 25, and voilà! Breakfast for many mornings ahead at an affordable price. Remember, planning your grocery trips wisely can save you more for those delightful brunches!