plzz answer .....

Asked by kirtichawla94 | 18th Feb, 2010, 04:56: PM

Expert Answer:

Dear Student

Say plane usual speed= x

if it travells 1500km  with xspeed it reaches say at timr T    

if it travells 1500km  with (x+250)speed it reaches at time    ( T-1500/(x+250))

The differencr between T and  ( T-1500/(x+250))= 30 min=0.5 hr

1500/(x+250)=0.5==> X+250=3000==> x=2750 km/hr



Answered by  | 18th Feb, 2010, 05:20: PM

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