Two carpenters, working in the same pace, can build 2 desks in two hours and a half. How many desks can 4 carpenters build in 2 hours? Choose the correct choice from the following answers.
A) 2.4.  B) 3.2.  C) 4.2.  D) 5.5.  E) 6.4
W = 2 desks   T = 2.5 hrs   Rate of 2 carpenters = 2×R   Rate = work done/ time   2xR = 2/2.5   R = 1/2.5 = 2/5 (this is the rate of each carpenter)   Work done by 4 carpenters in 2 hrs = 4 × rate of each carpenter x time = 4× 2/5 × 2 = 3.2 desks   3.2. is the correct answer.
<result>B</result>
Two carpenters, working in the same pace, can build 2 desks in two hours and a half. How many desks can 4 carpenters build in 2 hours?