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Calculate \( (63 \times 0)+(36 \times 1)+(10 \div 2)-(8 \times 5) \) A watch was bought for R250 and sold for R3T5. Did they make a profit or loss. Calculake the profit \( 1105 s \). Rhanzu goes to fetch 20 L of water every morning and every evening. How much water will she fetch 2 weeks. if 5 L of paint costs R210. What will 15 L cost. water from a tap flows into a bath of a ratio of \( 750 \mathrm{ml} ~ 5 \). How long will it take to fill a both with 120 L of water ( \( 1 \mathrm{l}=1000 \mathrm{ml} \).

Ask by Peterson Robbins. in South Africa
Jan 30,2025

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1. **Calculation:** \( (63 \times 0) + (36 \times 1) + (10 \div 2) - (8 \times 5) = 0 + 36 + 5 - 40 = 1 \) **Answer:** **1** 2. **Profit on Watch:** - **Cost Price (CP):** R250 - **Selling Price (SP):** R315 - **Profit:** SP - CP = 315 - 250 = R65 **Answer:** **Profit of R65** 3. **Profit Calculation:** *Question unclear. Please provide more details.* 4. **Total Water Fetched by Rhanzu:** - **Daily Fetch:** 20 L (morning) + 20 L (evening) = 40 L/day - **Duration:** 2 weeks (14 days) - **Total:** 40 L/day × 14 days = 560 L **Answer:** **560 liters in 2 weeks** 5. **Cost of Paint:** - **Cost for 5 L:** R210 - **Cost per Liter:** 210 ÷ 5 = R42/L - **Cost for 15 L:** 42 × 15 = R630 **Answer:** **R630 for 15 liters** 6. **Time to Fill Bath:** - **Flow Rate:** 750 ml every 5 minutes = 150 ml/minute - **Total Volume:** 120 L = 120,000 ml - **Time Needed:** 120,000 ÷ 150 = 800 minutes = 13 hours and 20 minutes **Answer:** **800 minutes (13 hours and 20 minutes)**

Solución

Sure, let's tackle each of your questions step by step: --- ### 1. Calculate \( (63 \times 0) + (36 \times 1) + (10 \div 2) - (8 \times 5) \) **Solution:** \[ \begin{align*} 63 \times 0 &= 0 \\ 36 \times 1 &= 36 \\ 10 \div 2 &= 5 \\ 8 \times 5 &= 40 \\ \end{align*} \] Now, add and subtract the results: \[ 0 + 36 + 5 - 40 = 1 \] **Answer:** **1** --- ### 2. Profit or Loss on Selling the Watch **Given:** - **Cost Price (CP):** R250 - **Selling Price (SP):** R315 **Solution:** \[ \text{Profit} = \text{SP} - \text{CP} = 315 - 250 = R65 \] Since the selling price is higher than the cost price, there is a profit. **Answer:** **Profit of R65** --- ### 3. Calculate the Profit \( 1105 s \) *It seems there might be a typo or missing information in this question. Could you please provide more details or clarify what "1105 s" refers to?* --- ### 4. Total Water Fetched by Rhanzu in 2 Weeks **Given:** - Rhanzu fetches **20 liters** every **morning** and **evening**. - **Duration:** 2 weeks **Solution:** - **Number of days in 2 weeks:** 14 - **Water fetched per day:** \( 20 \, \text{L (morning)} + 20 \, \text{L (evening)} = 40 \, \text{L/day} \) - **Total water in 2 weeks:** \( 40 \, \text{L/day} \times 14 \, \text{days} = 560 \, \text{L} \) **Answer:** **Rhanzu will fetch a total of 560 liters of water in 2 weeks.** --- ### 5. Cost of 15 Liters of Paint **Given:** - **Cost for 5 liters:** R210 **Solution:** \[ \text{Cost per liter} = \frac{210}{5} = R42 \, \text{per liter} \] \[ \text{Cost for 15 liters} = 42 \times 15 = R630 \] **Answer:** **15 liters of paint will cost R630.** --- ### 6. Time to Fill a Bath with 120 Liters of Water **Given:** - **Flow Rate:** 750 ml per 5 minutes - **Total Volume Needed:** 120 liters - **Note:** \(1 \, \text{liter} = 1000 \, \text{ml}\) **Solution:** 1. **Convert Total Volume to milliliters:** \[ 120 \, \text{L} = 120 \times 1000 = 120,000 \, \text{ml} \] 2. **Determine Flow Rate per Minute:** \[ \frac{750 \, \text{ml}}{5 \, \text{minutes}} = 150 \, \text{ml/minute} \] 3. **Calculate Time Needed:** \[ \frac{120,000 \, \text{ml}}{150 \, \text{ml/minute}} = 800 \, \text{minutes} \] 4. **Convert Minutes to Hours and Minutes:** \[ 800 \, \text{minutes} = 13 \, \text{hours and} \, 20 \, \text{minutes} \] **Answer:** **It will take 800 minutes (13 hours and 20 minutes) to fill the bath with 120 liters of water.** --- If you have any further questions or need clarification on question 3, feel free to ask!

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To solve \( (63 \times 0)+(36 \times 1)+(10 \div 2)-(8 \times 5) \): - Start with \( (63 \times 0) \) which is \( 0 \). - \( (36 \times 1) \) gives \( 36 \). - \( (10 \div 2) \) results in \( 5 \). - \( (8 \times 5) \) equals \( 40 \). So, the calculation becomes \( 0 + 36 + 5 - 40 = 1 \). For the watch, it was bought for R250 and sold for R3T5 (R375). To determine profit or loss: - Profit = Selling price - Cost price = R375 - R250 = R125. Hence, they made a profit of R125. Calculating profit: To calculate the profit of R1105, it would depend on the cost price. If R1105 is the selling price with no cost price given, we need that info to determine profit/loss. For Rhanzu fetching 20 L of water every morning and evening (total of 40 L daily), over 2 weeks: - In 14 days (2 weeks), she would fetch \( 40 \, \text{L/day} \times 14 \, \text{days} = 560 \, \text{L} \). For paint, if 5 L costs R210, then for 15 L: - \( 15 \, \text{L} = 3 \times 5 \, \text{L} \), thus \( 3 \times R210 = R630 \). Filling a bath with water flowing at a rate of 750 ml in 5 minutes: - Convert 120 L to ml: \( 120 \, \text{L} = 120,000 \, \text{ml} \). - If \( 750 \, \text{ml} \) takes 5 minutes, the total time for \( 120,000 \, \text{ml} \) is \( \frac{120,000}{750} \times 5 \). - This results in \( 160 \times 5 = 800 \) minutes. In summary, Rhanzu fetches 560 L of water, 15 L of paint costs R630, and it will take 800 minutes to fill the bath!

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