Question

three spraying machines working together can finish painting a hall in 90 minutes how long will it take for 5 machines for the same capacity to do the same job

Answer 1

for ex 30m area is painted in 90 mins by 3 machines it means one machine paint 10 m in 90 mins soo one machine takes 270mins to paint the 30m area if 5 machine are used to paint a 30m area than we 270/5 =54 mins soo 5 machine takes 54mins to paint the same area