Physics, asked by NeneAmaano4582, 1 year ago

Q3. On a 120 track , a train travels the first 30 km at a uniform speed of 30 km/h. How fast must the train travel the next 90 km so as to average 60 km/h for the entire trip?

Answers

Answered by utkarsh89
1
500m/s is right !!!!!!!!!
Answered by SaNuExTrEmE
0

ᴀɴsᴡᴇʀ                                                            

                            ɪɴ ᴛʜᴇ ғɪʀsᴛ ᴋᴍ sᴘᴇᴇᴅ ᴏғ ᴛʜᴇ ᴛʀᴀɪɴ, ᴠ1 = 30 ᴋᴍ/ʜ                            

                            sᴘᴇᴇᴅ ᴏғ ᴛʜᴇ ᴛʀᴀɪɴ ɪɴ ᴛʜᴇ ɴᴇxᴛ 90 ᴋᴍ, ᴠ2                            

                           ᴀᴠᴇʀᴀɢᴇ sᴘᴇᴇᴅ = ᴋᴍ/ʜ = (ᴠ + ᴠ)/2                                                                              

→ ᴠ2 = 90 ᴋᴍ/ʜ

Similar questions