यदि किसी आयत की लंबाई में 40% की वृद्धि की जाती है, तो उसकी चौड़ाई में कितने प्रतिशत की कमी की जानी चाहिए ताकि क्षेत्रफल अपरिवर्तित रहे (दो दशमलव स्थानों तक)?

In a town with 30,000 professionals, teachers make up 11% of the total professionals. If 46% of teachers are male, what is the number of female teachers in the town?

In a town's professional breakdown, doctors represent 18% and clerks represent 8% of the total professionals. If the number of doctors is 3000 greater than the number of clerks, what is the total number of professionals in the town?