Sravan hires a pre-paid taxi at Terminal A and drives 18 km towards the north.…

Sravan hires a pre-paid taxi at Terminal A and drives 18 km towards the north. He takes a right turn and drives 40 km to reach Junction X. He then drives 15 km after taking a left turn to reach Junction Y. Finally, he takes a left turn and drives 40 km and stops at Terminal B. How far is Terminal A with respect to Terminal B?