Question
The volume of a solid cube is 729 m3. If
whole cube is to be painted at a rate of Rs. 8 per m2, then what will be the cost of painting the cube?Solution
Let the edge length of the cube = ‘a’ metres Then, volume of the cube = a3 = 729 So, a = 729(1/3) = 9 So, total surface area of the cube = 6a2 = 6 × 92 = 486 m2 So, cost of painting the cube = 486 × 8 = Rs. 3888
A and B started a partnership business investing in the ratio of 3 : 8. C joined them after 4 months with an amount equal to 3/4th of B. What was their...
A shopkeeper give 4 articles free on the purchase of every 12 articles. He also allows a discount of 20% to customer and still earns 20% profit. Find th...
Three partners ‘A’, ‘B’ and ‘C’ started a business by investing in the ratio 2:5:6 respectively and the ratio of time for which they made th...
By selling 72 items, a man gets a profit equal to the selling price of 9 items. Find the profit percentage.
- Rahul bought a gadget and increased its price by 60% above the cost price. He sold it after offering a discount of 20% for Rs. 2400. What would be the sell...
If profit earned is (1/5)th of selling price, then calculate the percentage of profit.
15 pens and 30 pencils cost Rs. 180. If the cost of a pencil is Rs. 4, then find the cost of 10 pens.
A jacket is priced at Rs. 1200 and is sold after applying two back-to-back discounts of 15% and 30%. What is the final selling price?
A shopkeeper earns a profit of 30% by selling an article. What would be the approximate percent change in the profit percent, if he had paid 20% less an...
An item is marked up by Q% above its cost price. If a shopkeeper gives a 30% discount and still makes a profit of 40%, what discount should be given to ...
Relevant for Exams:
