A, B and C completed a piece of work costing Rs.1800. A worked for 6 days, B for 4 days and C for 9 days. If their daily wages are in the ratio 5 : 6 : 4, how much amount will be received by A?

A and B can finish a piece of work in 30 days. They worked at it for 20 days and then B left. The remaining work was done by A alone in 20 more days. A alone can finish the work in

A man, a woman and a boy can together complete a piece of work in 3 days. If a man alone can do it in 6 days and a boy alone in 18 days, how long will a woman take to complete the work?

Answer:A Explanation:Let be the number of days taken by B alone to finish the whole work Then, A alone will finish the whole work in 3x/4 * 2 days = 3x/2 days. Then, working together, 3x/2 * x/3x/2 + x = 18 days 3x * x/5x = 18 3x/5 = 18 Therefore, the number of days taken by B = x = 18 * 5/3 = 30 days.