Question

12 painters can paint a wall of 180m long in 3 days. How many painters are required to paint 200 m long wall in 5 days???

Answer 1

$12 \: painters \: paint \: a \: wall \: of \: 180 \: m \: long \: in \: 3 \: days. \\ \\ so \: 1 \: day \: = \: \frac{180}{3} \times 3 = 5 \\ \\ so \: 5 \: m \: is \: completed \: 1 \: day \\ \\ so \: the \: number \: of \: fingers \: required \: is \\ \frac{200}{5} \times 5 = 8.$