A man on tour travels first 160 km at 64 km/hr and the next 160 km at 80 km/hr. The average speed for the first 320 km of the tour is:
A. 75.2
B. 71.1
C. 70
D. 75
E. 80
সঠিক উত্তরঃ
B.
71.1
Explanation:
Related Questions (Any University/Year)
- একটি ঝুড়িতে আপেল এবং কমলা মিলিয়ে ৭০ টি ফল আছে। প্রতিটি আপেল এবং কমলা ১৯ টাকা দরে কেনা হয়েছে । সবগুলো ফল কিনতে যদি ১৩৩০ টাকা খরচ হয় এবং আপেল এর চাইতে চারটি কমলা কম থাকে। তবে ঝুড়িতে কয়টি আপেল ছিল?
- Rabib has x more marbles than Rafi has. Together they have y marbles. Which of the following represents the number of marbles that Rafi has
- A shopkeeper marks an article at such a price that after allowing a discount of 30% on the tag price (including tax) he makes a profit of 40%. If the tag price of the article including tax is Tk. 460, then the cost price of that article is -
- The average weekly salary per head of all employees is Tk. 1000 (Supervisors and Labours). The average weekly per head salary of all supervisors is Tk. 6000 while the average weekly salary per head of all labours is Tk. 750. If there are 840 labours in it find the number of supervisors
- The price of a laptop was sold at 10% discount on the price. If the profit is Tk. 2400 what was the cost of the laptop is TK?
- If y*x=y2x for all positive integers than (3*4)*2 =
- If n is an integer such that when n is divided by 2, the remainder is 1, when n is divided by 3, the remainder is 2, and when n is divided by 4, the remainder is 3. What is the least possible value of n?
- A tank contains 10,000 gallons of water. Each week 500 gallons of water evaporates from the tank. Water sells for $0.50 a gallon now, and the price of water increases by 5 cents a week. In dollars, what will the value of the water in the tank be x weeks from now?
- একটি সমকোনী ত্রিভুজের একটি কোন ৩০° হলে অপরটি কত ডিগ্রি ?
- Which one of the following is the minimum value of the sum of two integers whose product is 36?
- এক মণ ধানে চাল ও তুষের অনুপাত ১৪ঃ৬ হলে, এতে শতকরা কি পরিমান চাল আছে?
- Running at the same constant rate, 6 identical machines can produce a total of 270 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes?
- If Robert can sell 40 envelopes in 1 minute and Paul can do the same job in 80 seconds how many minutes ( to the nearest minute) it will take the two of them working together, to seal 350 envelopes?
- After paying a 10 percent tax on all income over $3,000, a person had a net income of $12,000. What was the income before taxes?
- The length of each side of square A is increased by 100 percent to make square B. Again the length of each side of square B is increased by 50 percent to make square C. By what percent is the area of square C greater than the sum of the areas of square A and B?
- 50 জন ছাত্রের একটি শ্রেনিতে রূপমের স্থান হচ্ছে শীর্ষ থেকে অষ্টম এবং হাসিবের স্থান হচ্ছে নিচ থেকে বিমতম। তাহলে রূপম ও হাসিবের মাঝে কতজন ছাত্র আছে?
- Rayaan purchased equal number of bananas at two different rates-one at the rate of 8 taka per dozen and the other at the rate of 10 taka per dozen. After that, he sold those bananas at an average rate of 11 taka per dozen and thus made a profit of 100 taka. How many dozens of banana did he purchase altogether?
- There are 5 machines that make 5 parts in 5 minutes. How long does it take to make 100 parts on 100 machines?
- If one man or two women or three boys can finish a job in 66 days, then find out the number of days in which that work can be done by one man, two women, and three boys.
- What percent of 50 is 15?