I believe the answer is 4 because 6m/29= 20.6897 and so then you do 20.6897 x 3= 62.0691. So 3 is too small so do 20.6897x 4= <span>82.7588. 82 >78 so the answer is that you need 4 boards. </span>
A=12 120% of a =80% of b 120%a = 80%b 120a/100 = 80b/100 Divide through by 100 120a = 80b Divide through by 80 120a/80 = b But a=12 120x 12/80 = b 18 = b b = 18
