Two ribbon lengths are in the ratio 3:5. The longer exceeds the shorter by 28 cm. Enter their total length in cm.
الإجابة الصحيحة
112
الشرح
The 2-part difference equals 28 cm, making one part 14 cm; the combined 8 parts then measure 112 cm. Dividing 28 by the sum of the terms would find neither one part nor the stated difference correctly.