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ACT® Math

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Difficult

Working Together

ACTMAT-J40XXK

Wilson can paint the walls of his room in $4\text{ hours}$ by himself when working at a constant rate. Wilson's older brother Adam can paint the same walls by himself in $2\text{ hours}$ when working at a constant rate.

How long would it take for Wilson and Adam to paint the walls of Wilson's room together at their current rates?

A

$3\text{ hours}$

B

$2 \cfrac{1}{2} \text{ hours}$

C

$1 \cfrac{1}{2} \text{ hours}$

D

$1 \cfrac{1}{3} \text{ hours}$

E

$1\cfrac{1}{6} \text{hours}$