Problem: how long does a train 110 m long running at the speed of 72 km / hr takes to cross a bridge 132 m length ?
Rationale: "speed = 72 * 5 / 18 = 20 m / sec total distance covered = 110 + 132 = 242 m . required time = 242 / 20 = 12.1 sec . answer : b"
annotated_formula: divide(add(110, 132), multiply(72, const_0_2778))