**Question:**

A is thrice efficient as B and C is twice as efficient as B. What is the ratio of number of days taken by A, B and C, when they work individually? A. 2 : 6 : 3 B. 2 : 3 : 6 C. 1 : 2 : 3 D. 3 : 1 : 2

__D__

r

__D__

Simple 3.1.2

2:6:3

Let 'x' be no: of days taken by B .

.'. The ratio of no: days taken by A , B & C .

A B C

x/3 x x/2

1/3 1 1/2 .

Multiplying by 6.

6/3 6/1 6/2

2 : 6 : 3

3:1:2

3:1:2

A. Is da answer