It takes one machine to paint 1000 sq.m. surface in 24 minutes.Another machine does the same job in 40 seconds.How much time will it take if both machines are put on the same work? Choose the most appropriate option:  A) 10.0 seconds  B) 20.0 seconds  C) 38.9 seconds  D) 40.0 seconds  E) 52.0 seconds
By guess it is clear that the time taken will be less than 40 seconds and very near to it. Therefore, answer 38.9 seconds will be correct. Answer-38.9 seconds
<result>C</result>
It takes one machine to paint 1000 sq.m. surface in 24 minutes.Another machine does the same job in 40 seconds.How much time will it take if both machines are put on the same work?