two carpenters , working in the same pace , can build 2 desks in two hours and a half . how many desks can 3 carpenters build in 4 hours ?
"w = 2 desks t = 2.5 hrs rate of 2 carpenters = 2 × r rate = work done / time 2 xr = 2 / 2.5 r = 1 / 2.5 = 2 / 5 ( this is the rate of each carpenter ) work done by 3 carpenters in 4 hrs = 3 × rate of each carpenter x time = 3 × 2 / 5 × 4 = 4.8 desks b is the correct answer ."
multiply(multiply(divide(divide(2, divide(4, 2)), 2), 3), 4)