The present ages of three persons are in the ratio of 4: 7:9 Eight years ago, the sum of their ages was 56. what are their present ages in years?

8, 20, 28

16, 28, 36

20, 35 , 45

12, 21, 27

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ব্যাখ্যা ও সঠিক সমাধান

উত্তর: 16, 28, 36

Let, their present ages be, 4x, 7x, 9x respectively Then, ( 4x - 8) + ( 7x - 8) + ( 9x - 8) = 56 20x = 80 x = 4 Present ages are 4x = 16, 7x = 28 and 9x = 36 years

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বিস্তারিত সমাধান

The present ages of three persons are in the ratio of 4: 7:9 Eight years ago, the sum of their ages was 56. what are their present ages in years?

There are 12 more apples than oranges in a basket of 36 apples and oranges. How many apples are in the basket?

The minimum value of 2x2 +8x -5 is

There are 900 students in a school. 4% of them left the school and 50% of the remaining are girls. How many girls remained?

If product of 3 consecutive integers is 120, then the sum of the integers is--

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. what is the probability that the ticket drawn has a number which is a multiple of 3 or 5?

what least number must be added to 1056 , so that the sum is completely divisible by 23?

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?

3 pumps , working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?

৯৬ টি আম x, y এবং z-এর মধ্যে এমনভাবে ভাগ করে দেয়া হলো যে, x পেল z-এর ৪ গুণ এবং z পেল y-এর ৩ গুণ আম। y কয়টি আম পেল?

The average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person?

কোর্স

অনুসন্ধান করুন

বিস্তারিত সমাধান

The present ages of three persons are in the ratio of 4: 7:9 Eight years ago, the sum of their ages was 56. what are their present ages in years?

সম্পর্কিত বিষয় সমূহ

সম্পর্কিত অন্যান্য প্রশ্ন

There are 12 more apples than oranges in a basket of 36 apples and oranges. How many apples are in the basket?

The minimum value of 2x2 +8x -5 is

There are 900 students in a school. 4% of them left the school and 50% of the remaining are girls. How many girls remained?

If product of 3 consecutive integers is 120, then the sum of the integers is--

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. what is the probability that the ticket drawn has a number which is a multiple of 3 or 5?

what least number must be added to 1056 , so that the sum is completely divisible by 23?

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?

3 pumps , working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?

৯৬ টি আম x, y এবং z-এর মধ্যে এমনভাবে ভাগ করে দেয়া হলো যে, x পেল z-এর ৪ গুণ এবং z পেল y-এর ৩ গুণ আম। y কয়টি আম পেল?

The average weight of 8 persons increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person?