🇨‌🇹‌🇪‌🇹‌ 🇱‌🇦‌🇰‌🇸‌🇭‌🇦‌🇾‌

📘 Post 200 – MIND MAP (Speed–Time–Distance : STD)
🚀 CTET + KVS + NVS + DSSSB के लिए सबसे Powerful Revision

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🧠 Mind Map – STD (Speed, Time, Distance)

🚀 SPEED–TIME–DISTANCE 🚀
│
┌──────────────┬──────────────┬──────────────┐
│ │ │ │
Distance (D) Speed (S) Time (T) Conversion
│ │ │ │
Formula: D/T D/S 1 km = 1000 m
S×T 1 hr = 60 min
1 m/s = 3.6 km/h

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🎯 Golden Formulas

✔ D = S × T
✔ S = D ÷ T
✔ T = D ÷ S

✔ Relative Speed (RS)
➡ Same direction = (A – B)
➡ Opposite direction = (A + B)

✔ Average Speed
= 2ab / (a + b) (same distance पर)

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🔥 STD में बार-बार आने वाले Topics

✔ Train Problems (Length + Relative Speed)
✔ Boat & Stream (Upstream–Downstream)
✔ Average Speed
✔ Walking / Running Problems
✔ Time Difference Problems

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💡 Super Tricks

✨ Trick 1: “STD Triangle”
S
D T
किसी भी 2 को ढककर तीसरा फॉर्मूला मिल जाता है।

✨ Trick 2: km/h → m/s
👉 गति × 5/18
m/s → km/h
👉 गति × 18/5

✨ Trick 3: Relative Speed सिर्फ़ Speed जोड़ना–घटाना है
Distance वैसी ही रहती है।

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📝 Exam Focus
CTET: हर सेट में 1–2 प्रश्न
KVS/NVS: Train + Relative Speed पक्का
REET/DSSSB: Average Speed + Boat Stream बार-बार

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👉 Next Post (201): MATH PYQ – Speed, Time, Distance (Without Answer)

#CTET200 #MindMap #MathSTD #KVS2025 #NVS #DSSSB #REET

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🇨‌🇹‌🇪‌🇹‌ 🇱‌🇦‌🇰‌🇸‌🇭‌🇦‌🇾‌

📘 Post 202 – MATH PYQ ANSWERS + Explanation (Speed–Time–Distance : STD)
🚀 CTET + KVS + NVS + DSSSB – Final Revision Booster

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🧠 Answers with Short Explanation

✔ Q1. 60 km / 5 hr = 12 km/h
👉 Formula: Average Speed = Distance ÷ Time

✔ Q2. Opposite direction में गति जोड़ते हैं → Relative Speed
👉 इसलिए सही उत्तर: Relative Speed

✔ Q3. 18 km/h × 5/18 = 5 m/s
👉 km/h → m/s conversion: ×5/18

✔ Q4. Same direction → 60 – 40 = 20 km/h
👉 Relative = Faster – Slower

✔ Q5. Upstream = Boat – Stream → 12 – 3 = 9 km/h
👉 Upstream में गति घटती है

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🎯 Quick Revision (STD Formulas)
✔ D = S × T
✔ S = D ÷ T
✔ T = D ÷ S
✔ Relative Speed (Opposite) = A + B
✔ Relative Speed (Same) = A – B
✔ m/s → km/h = × 18/5
✔ km/h → m/s = × 5/18

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👉 Next Post (203): MIND MAP – POLITY (भारत का संविधान : मूल तथ्य)

#CTET202 #MathSTD #PYQAnswers #KVS2025 #NVS #DSSSB #REET #ctet_tyari

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