A contractor employed 210 men to build a house in 60 days. After 12 days , he was joined by 70 more men. In how many days will the remaining work be finished.

Question

anonymous · Answer

in this case a house requires 210 * 60 man days to build
after the first 12 days, 210 * 48 man days remain
for the next 48 days, 280 people are building  the house.

anonymous · Answer

i have got it but could u explain a little more

anonymous · Answer

(210 * 60) = (12 * 210) + (280 * x)

solve for x

anonymous · Answer

now i got it completely thnxx for ur help 
thanks very much

anonymous · Answer

It isn't the best question in the world. There an ambiguity in the question.

anonymous · Answer

i am in class 8 it was tough for me