If the perimeter and diagonal of a rectangle are 42cm and 15cm respectively. Then the sides areA11m, 10mB13m,8mC14m, 7mD12m, 9mAnswer: D. 12m, 9m Read Explanation: 2(a+b)=42 a+b=21 d=15 d²=a²+b² 15²=a²+b² a²+b² = 12²+9²=225Read more in App