If 18 workers can lay a road in 15 h, then how many more workers are required to lay the same road in 9 h?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 12
Number of workers × times = constant
⇒ 18 × 15 = x × 9
⇒ 270 = 9x
⇒ x = 270/9
x = 30
Therefore we need 30 workers to lay the same roadin 9hr
Requried workers are
⇒ 30 - 18 = 12