In a kilometer race, A beats B by 50 meters or 10 seconds. What time does A take to complete the race?
A. 200 sec
B. 190 sec
C. 210 sec
D. 150 sec
সঠিক উত্তরঃ
B.
190 sec
Explanation:
Another Explanation (5):
কিলোমিটার দৌড়ে A-এর সময় নির্ণয় 🏃♂️
সমস্যার সারসংক্ষেপ
একটি ১ কিলোমিটারের দৌড়ে, A, B-কে ৫০ মিটার অথবা ১০ সেকেন্ডে হারায়। A কত সময়ে দৌড় শেষ করে?
সমাধানের ধাপ 🪜
-
B-এর গতিবেগ নির্ণয়
- B, ১০ সেকেন্ডে ৫০ মিটার যায়। ⏱️
- অতএব, B-এর গতিবেগ = ৫০ মিটার / ১০ সেকেন্ড = ৫ মিটার/সেকেন্ড। 💨
-
B-এর মোট সময় নির্ণয়
- B ১০০০ মিটার দৌড়াতে সময় নেয় = ১০০০ মিটার / ৫ মিটার/সেকেন্ড = ২০০ সেকেন্ড। ⏱️
-
A-এর সময় নির্ণয়
- A, B-এর থেকে ১০ সেকেন্ড আগে দৌড় শেষ করে। 🥇
- অতএব, A-এর সময় = ২০০ সেকেন্ড - ১০ সেকেন্ড = ১৯০ সেকেন্ড। ⏱️
ফলাফল 🎉
A-এর দৌড় শেষ করতে সময় লাগে ১৯০ সেকেন্ড। 🥳
গণনার টেবিল 📊
| বিষয় | মান | একক |
|---|---|---|
| B-এর হার | ৫০ | মিটার অথবা ১০ সেকেন্ড |
| B-এর গতিবেগ | ৫ | মিটার/সেকেন্ড |
| B-এর মোট সময় | ২০০ | সেকেন্ড |
| A-এর সময় | ১৯০ | সেকেন্ড |
গুরুত্বপূর্ণ বিষয় 💡
- গতিবেগ, দূরত্ব এবং সময়ের মধ্যে সম্পর্ক বোঝা জরুরি। 🤓
- সমস্যার প্রতিটি ধাপ ভালোভাবে বিশ্লেষণ করতে হবে। 🤔
- এককগুলির (unit) প্রতি খেয়াল রাখতে হবে। 📏
আশা করি, এই ব্যাখ্যাটি আপনার কাজে লাগবে! 👍
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