Question 52417
April can do the job is x hours;
EQUATION:
{{{1/10+1/x=1/6}}}
{{{60(1/10)+60(1/x)=60(1/6)}}}
{{{6+60/x=10}}}
10x-6x=60
4x=60
x=15
Hence, April can do the job in 15 hours.
Paul.