An algebra problem by A Former Brilliant Member

Algebra Level pending

An airplane flew 900 miles in 3 hours against a head wind blowing 30 miles per hour. What is the speed of the plane in still air?

Try some of my problems: Math Problems - Set 1 .
270 miles per hour 300 miles per hour 330 miles per hour none of these

A Former Brilliant Member by A Former Brilliant Member

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1 solution

let V = speed of the airplane in still air

f o r m u l a : formula: V = V= d t \frac{d}{t}

s o l u t i o n : solution:

V − 30 = V-30= 900 3 \frac{900}{3}

V = 330 V=330 m i l e s miles p e r per h o u r hour

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