For the following questions answer them individually
A man wants to purchase a car and for that, he checks the rating of the car on internet. He finds the ratings of $$\frac{9}{10}$$ for comfort and $$\frac{8}{10}$$ for resale value. Based on his requirements, he gives a weightage of 55% to comf011 and 45% to resale value. Calculate rhe final raring of the car.
Two successive discounts of 50 percent and 40 percent are equivalent to a single discount of ______.
If the selling price of an article is $$\frac{11}{5}$$ times of the cost price, then the gain percentage is:
A heap of sand is in the shape of a right circular cone. It has a slam height of 10 feet and a base diameter of 16 feet. Find the volume of sand making up the heap. Take $$\pi = 3.14$$.
A dishonest retailer sells his goods at a profit of 18% by weighing 800 g instead of 1 kg.
Find his actual gain percentage.
A sum of Rs.2,100 is invested for 1 year at 20% per annum, interest compounded half - yearly. Find the compound interest.
Given that 15% of X’s income = 20% of Y’s income = 30% of Z’s income. The sum of their incomes is ₹9,000. If Y spends ₹2,200 from his income, then Y’s saving is:
A and B can complete a piece of work in 8 days and 16 days respectively. If A and B work on alternate days, starting with B, in how many days the work will be completed?