Question
A can complete a piece of work in 10 days , and B can
complete the same work in 15 days . They start working together, and after some days A leaves. B completes the remaining work in 5 days . For how many days did A and B work together ?Solution
Let total work = LCM(10, 15) = 30 units A’s 1-day work = 30/10 = 3 units B’s 1-day work = 30/15 = 2 units B alone works for 5 days → work done by B = 2 × 5 = 10 units Remaining work done together = 30 − 10 = 20 units Together (A + B) do per day = 3 + 2 = 5 units Days they worked together = 20 / 5 = 4 days
A manufacturer produces 500 units of a certain product, with each unit costing him Rs 120 to produce. Out of these, he sells 300 units at a profit of 15...
If there is a loss of 20% on selling the article at 16/25 of the original selling price then what will be the percentage profit after selling the articl...
The ratio of cost prices of two articles ‘A’ and ‘B’ is 1:3 respectively and the average cost price of articles ‘A’ and ‘B’ is Rs. 1200....
The cost price of five dozen sandwiches is Rs. 300. After selling 42 sandwiches at the rate of Rs. 90 per dozen, the shopkeeper reduced the rate and sol...
'A' purchased an article and sold it to 'B' at 10% profit. 'B' marked it up by 25% above the price at which 'A' has purchased it and then sold it after ...
A shopkeeper sold an article A at 20% gain and another article B at 20% loss. Find her overall gain or loss percent if selling price of both articles we...
A shopkeeper raises the price of a watch by 20%, followed by another increase of 30%. After offering a 25% discount, he makes a p...
Article ‘P’, if sold at a profit of 20% earns a profit of Rs. 500. If article ‘P’ is marked 40% above its cost price and then sold after offerin...
A purchased an article for Rs 1300. She sold the article at 15% profit. She then added Rs 300 to the amount received and purchased a purse such that the...
