Math, asked by anshumanpanwar8745, 1 year ago

On a 120 km long railway track, a train travells the first 80 km at a uniform speed of 160km/h. calculate the speed with which the train should move rest of the track so as to get the average speed of 80 km/h for the entire trip

Answers

Answered by SaNuExTrEmE
1

ᴀɴsᴡᴇʀ                                                            

                            ɪɴ ᴛʜᴇ ғɪʀsᴛ ᴋᴍ sᴘᴇᴇᴅ ᴏғ ᴛʜᴇ ᴛʀᴀɪɴ, ᴠ = ᴋᴍ/ʜ                            

                            sᴘᴇᴇᴅ ᴏғ ᴛʜᴇ ᴛʀᴀɪɴ ɪɴ ᴛʜᴇ ɴᴇxᴛ ᴋᴍ, ᴠ (ᴛᴏ ʙᴇ ᴅᴇᴛᴇʀᴍɪɴᴇᴅ)                            

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

                                                       = ( ᴋᴍ/ʜ + ᴠ)/                                  

→ ᴠ = ᴋᴍ/ʜ

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