Question
Working alone, B can complete the work in 16 days. C is
twice as efficient as B and A takes 4 days more than it takes C to complete the work. Working together, in how much time would they be able to complete 13 such works?Solution
Time taken by B to complete the work = 16 days Time taken by C to complete the work = 16/2 = 8 days Time taken by A to complete the work alone = 8 + 4 = 12 days Work done by A, B and C together in 1 day. ⇒ (1/16 + 1/8 + 1/12) = (3 + 6 + 4)/48 = 13/48 this means if would take 48/13 days for A, B and C to complete the work together ∴ Time taken A, B and C to complete 13 works = 13 × 48/13 days = 48 days
Mohini went shopping to buy a shirt with some money. She selected a shirt, which is marked Rs.200 higher price than the money she had. But shopkeeper g...
A shopkeeper mixes 40 kg sugar worth Rs.15 per kg with 160 kg sugar worth Rs. 25 per kg. At what rate should he sell the mixture per kg to gain a profit...
A and B invest in a business in the ratio 4 : 5. After 10 months B leaves the business after withdrawing his investment. In the first year the business...
After selling 20 pens, a Shopkeeper earn a profit of the selling price of 6 books. While selling 20 books, a shopkeeper losses a selling price of 8 pen...
A fruit seller buys oranges at the rate of 11 for ₹55. How many oranges should he sell for ₹54 to gain 20%?
Shyam marked an article 25% above cost price and sold it for Rs. 1080 after allowing a discount of 10%. Find his profit (in Rs.).
An article is sold at 15 (1/2) % profit. If its C.P. is increased by Rs. 40 and at the same time if its SP is also increased by Rs. 30, then % of profit...
The cost price of an article is Rs. (4n + 90). It is marked 25% above its cost price and sold after allowing a discount of Rs. 150. If the selling price...
Kavita purchased a microwave oven for Rs. 24,200 and managed to sell it for Rs. 27,830. Determine her percentage profit.
A trader marks an article 50% above its cost price. He sells it at a discount of 20% on the marked price. If instead he had given a discount of only 10%...
Relevant for Exams:
