EngineeringSurya · Class 2-3
Sadak kitni chaudi ho? Engineer gin ke batate hain
Tumhari gali patli hai aur shehar ki badi sadak chaudi. Aisa kyun?
Socho pehle… phir dekho jawab
Kyunki badi sadak par bahut zyada gaadiyaan chalti hain. Engineer pehle gaadiyaan ginte hain, phir tay karte hain ki sadak mein kitni lane (gaadiyon ki line) hon.
Lane matlab sadak par gaadiyon ki ek line. Kam gaadiyaan — kam lane. Bahut gaadiyaan — 4 ya 6 lane. Ek bada truck zyada jagah leta hai, isliye engineer truck ko kai car ke barabar ginte hain.
Kyun badi tez sadak par chauraha nahi hota? Kyunki tez gaadiyon ke beech se seedha paar karna khatre ka kaam hai. Isliye wahan neeche underpass (surang-raasta) ya upar pul banta hai.
Pul pehle se chauda banana samajhdaari hai. Sadak baad mein chaudi karna aasaan hai, par bane hue pul ko chauda karna bahut mushkil!
Ghar pe try karo
Ghar ke andar se (khidki ya balcony) bade ke saath 2 minute gaadiyaan gino: cycle, scooter, car, truck. Ek table banao. Phir socho — tumhari sadak ko kitni lane chahiye?
Wow!
Engineer bade truck ko ek car nahi, kai car ke barabar ginte hain — kyunki woh zyada jagah aur samay leta hai!
Mummy-Papa ke liye
Aaj bachche ke saath ghar se gaadiyaan gin kar table banaiye aur poochiye: 'Hamari sadak ko kitni lane chahiye?'
3 sawaal
- Lane kya hai?
Jawab dekho
Sadak par gaadiyon ki ek line. Lane sadak par gaadiyon ki ek line hai.
- Tez sadak par chauraha kyun nahi hota?
Jawab dekho
Tez gaadiyon ke beech seedha paar karna khatre ka kaam hai. Isliye paar karne ke liye underpass ya pul banta hai.
- Pul pehle se chauda kyun banate hain?
Jawab dekho
Baad mein pul chauda karna bahut mushkil hai. Sadak chaudi karna aasaan, pul chauda karna mushkil.
NCERT se jodo: NCERT Class 3 EVS — hamare aas-paas ke raaste aur yatayat