Question
Three planks of different lengths, R, S and T are nailed together to make a frame as shown. Plank R has 3 holes which divide it into 4 equal parts. Plank S has 4 holes which divide it into 5 equal parts and Plank T has 5 holes which divide it into 6 equal parts. In the frame, the holes N, P and Q are three corners of an equilateral triangle. Plank R is 336 cm long. What is the total length of Plank R, Plank S and Plank T?
3 m

Click button first when a symbol is required. X

Three planks of different lengths, R, S and T are nailed together to make a frame as shown. Plank R has 3 holes which divide it into 4 equal parts. Plank S has 4 holes which divide it into 5 equal parts and Plank T has 5 holes which divide it into 6 equal parts. In the frame, the holes N, P and Q are three corners of an equilateral triangle. Plank R is 336 cm long. What is the total length of Plank R, Plank S and Plank T?