Discussion Forum



1)

A 70 cm long wire is to be cut into two pieces such that one piece will be 2/5 as long as the other. How many centimetres will the shorter piece be ?


A) 10

B) 14

C) 20

D) 28

Answer:

Option C

Explanation:

Let the x and y are the two peices
x + y = 70
Assume y be the largest piece
Therefore x = (2 / 5) y
= 2y / 5
Solving the equation we will get (2y/5) + y = 70
7y = 350
y = 50cm
Therefore x = 70 - 50 = 20cm