Math, asked by alloffforyou, 5 months ago

एक 200 मिनट लंबी दौड़ में धावक B को 3 सैकैण्ड से हरा देता है। यदि A ओर B की गति में 1•5 मि•/सै• का अंतर है तो Aकी गति मिनट/सैकैण्ड में याद करें ​

Answers

Answered by RvChaudharY50
2

उतर :-

A 200 मीटर की लंबी दौड़ को पूरा करने में x सैकैण्ड लेता है l

तब,

→ A की चाल = दूरी / समय = (200/x) मि•/सै•

अब,

→ B का समय = (x + 3) सैकैण्ड

→ B की चाल = 200/(x + 3) मि•/सै•

अत,

→ A की गति - B की गति = 1•5 मि•/सै•

→ (200/x) - {200/(x + 3)} = 3/2

→ 200[(x + 3 - x)/(x² + 3x)] = 3/2

→ 3(x² + 3x) = 1200

→ x² + 3x - 400 = 0

→ x = (√1609 - 3)/2 and -(√1609 - 3)/2

→ x ≈ (40 - 3)/2 = 18.5 सैकैण्ड

इसलिए,

→ A की गति = दूरी / समय = (200/x) = 200/(18.5) ≈ 10.8 मीटर / सेकंड l

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