CAN YOU GET YOUR FLIGHT ON TIME
Level
pending
A PLANE LEFT 30 MINUTES LATER THAN THE SCHEDULED TIME AND IN ORDER TO REACH ITS DESTINATION 1500 KILOMETERS AWAY IN THE TIME IT HAS TO INCREASE ITS SPEED BY 250 KILOMETERS PER HOUR FROM ITS USUAL SPEED. FIND THE USUAL SPEED
The answer is 750.
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1 solution
1500/x-0.5 =y+250 AND 1500/x=y where x is the time in hours and y=original speed Solve for x and y. y is 70 and x=2