Problem: a man walking at a rate of 10 km / hr crosses a bridge in 12 minutes . the length of the bridge is ?
Rationale: speed = 10 * 5 / 18 = 50 / 18 m / sec distance covered in 10 minutes = 50 / 18 * 12 * 60 = 2000 m answer is a
annotated_formula: multiply(divide(multiply(10, const_1000), const_60), 12)