Narrations Summary

A is thrice as efficient as B. A takes 24 days less than B to complete a work. If they work together, in how many days, will the work be completed?

A certain numberof persons can complete a work in 34 days working 9 hours a day. If the number of persons is decreased by 40%, then how many hours a day should the remaining persons work to complete the work in 51 days?

A can do 40% of a work in 12 days, whereas B can do 60% of the same work in 15 days. Both work together for 10 days. C completes the remaining work alone in 4 days. A, B and C together will complete 28% of the same work in :

The selling price of an article is Rs. 624 when it is sold at 30% profit. If the cost price of the article is increased by Rs. 50 and the selling price is increased by Rs. 60, then what will be the profit percentage (nearest to an integer)?