Name: SAT Math Help & School Math Mastery
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#33969

distance

rate

hard

120 sec

An airplane travels $d$ miles in $t$ hours at a constant speed. If the airplane were to travel at a speed that is 20 miles per hour faster, how many hours would it take to travel the same distance $d$ ?

A.

$\frac{d}{t + 20}$

B.

$\frac{d}{d / t + 20}$

C.

$\frac{t}{1 + 20 t / d}$

D.

$\frac{d}{t} + 20$