A man does double the work done by a boy in the same time. The number of days that 3 men and 4 boys will take to finish a work which can be done by 10 men in 8 days is
Show answer & explanation
Correct answer: B
Explanation
The correct option is 2.
work done by man : work done by boy = 2 : 1
let work done by a man in 1 day = 2 units
let work done by a boy in 1 day = 1 units
work done by 10 men in 8 days = 10 × 2 × 8 = 160 units
work done by 3 men and 4 boys in 1 day = 3 × 2 + 4 × 1 = 10 units
number of days = 
= 16 days