Rumi and Rony can finish a task, working together, in 12 days. If Rony alone can finish that in 20 days, how many days will Rumi need to finish the task working alone?

উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।

ব্যাখ্যা ও সঠিক সমাধান

উত্তর: 30

Together the can finish 1/12 of the work in a day. Rony alone can finish 1/20 of the work in a day. Rumi alone can finish = 1/12 - 1/20 = (5 - 3)/60 = 1/30 of the work in a day. So, Rumi alone can finish the work in 30 days.

পূর্ববর্তী আগের প্রশ্ন

পরবর্তী সামনের প্রশ্ন

অনুসন্ধান করুন

বিস্তারিত সমাধান

Rumi and Rony can finish a task, working together, in 12 days. If Rony alone can finish that in 20 days, how many days will Rumi need to finish the task working alone?

The price of a certain television set is discounted by 10 percent, and the reduced price is then discounted by 10 percent. The series of successive discount is equivalent to a single discount of -

If u> t, r> q , s>t, t>r, which of the following must be true?

A pen was sold at 15% loss. If the selling price was Tk. 8 more, than the seller could have made a profit of 10%. What was the purchase price of pen?

Ms. Lyla wants to put up fencing around three sides of her rectangular garden and have a side of 20 meter unfenced. If the yard has an area of 680 square meters, how many yards of fencing does she need?

The difference between two numbers is 7 and their product is 60, then one of the two numbers must be -

If the diameter of a circle is doubled the area will be -

In a sugar-water solution, the ratio of water to sugar is 8:3. If you add 2 Kgs of sugar, the ratio become 2:1. What was the amount of sugar in the original solution?

If the area of rectangle R with length 4 feet is equal to the area of square S, which has a perimeter of 24 feet , then the perimeter of rectangle R equals -

What percent of 25 is 0.20?

If N and P are both odd numbers, which of the following numbers must be an even number?

কোর্স

অনুসন্ধান করুন

বিস্তারিত সমাধান

Rumi and Rony can finish a task, working together, in 12 days. If Rony alone can finish that in 20 days, how many days will Rumi need to finish the task working alone?

সম্পর্কিত বিষয় সমূহ

সম্পর্কিত অন্যান্য প্রশ্ন

The price of a certain television set is discounted by 10 percent, and the reduced price is then discounted by 10 percent. The series of successive discount is equivalent to a single discount of -

If u> t, r> q , s>t, t>r, which of the following must be true?

A pen was sold at 15% loss. If the selling price was Tk. 8 more, than the seller could have made a profit of 10%. What was the purchase price of pen?

Ms. Lyla wants to put up fencing around three sides of her rectangular garden and have a side of 20 meter unfenced. If the yard has an area of 680 square meters, how many yards of fencing does she need?

The difference between two numbers is 7 and their product is 60, then one of the two numbers must be -

If the diameter of a circle is doubled the area will be -

In a sugar-water solution, the ratio of water to sugar is 8:3. If you add 2 Kgs of sugar, the ratio become 2:1. What was the amount of sugar in the original solution?

If the area of rectangle R with length 4 feet is equal to the area of square S, which has a perimeter of 24 feet , then the perimeter of rectangle R equals -

What percent of 25 is 0.20?

If N and P are both odd numbers, which of the following numbers must be an even number?