A 70 cm long wire is to be cut into two pieces so that one piece will be 2/5th of the other, how many centimeters will the shorter piece be?\nOptions:\n(A) 10\n(B) 20\n(C) 30\n(D) 40\n(E) 50
Think hard. Detailed solution:
(B)
1: 2/5 = 5: 2\n2/7 * 70 = 20.

So, the answer is (B)