Problem: a man walking at a rate of 15 km / hr crosses a bridge in 35 minutes . the length of the bridge is ?
Rationale: "speed = 15 * 5 / 18 = 15 / 18 m / sec distance covered in 35 minutes = 15 / 18 * 35 * 60 = 1750 m answer is b"
annotated_formula: multiply(divide(multiply(15, const_1000), const_60), 35)