due to some technical problems, an aeroplane started started late by one hour from starting point. the pilot decided to increase the speed of aeroplaneby 100km/hr from usual speed ,to cover the distance of 1200km.find speed of plane
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let aeroplane spheed =X
right time take by aeroplane from initial point to final point=Y
now
1200/X=Y-----------(1)
1200/(x+100)=(Y-1)--------(2)
from equation (1) and (2)
1200 {1/x-1/(x+100)}=1
solve this quadratic equation
you got X=300km/h
right time take by aeroplane from initial point to final point=Y
now
1200/X=Y-----------(1)
1200/(x+100)=(Y-1)--------(2)
from equation (1) and (2)
1200 {1/x-1/(x+100)}=1
solve this quadratic equation
you got X=300km/h
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