৮২৯১
At what rate of compound interest per annum will a sum of Tk. 4000 becomes Tk. 4840 in 2 years?
উত্তর
10%
৮২৯৩
When 25% of the first number is added to the second number, the second number becomes 3/2 times the first number. What is the ratio of the first number to the second number?
উত্তর
4 : 5
৮২৯৪
A committee of 3 men and 2 women is to be formed from 5 men and 4 women. In how many ways can the committee be formed?
উত্তর
60 ways
৮২৯৫
The ratio of length and breadth of a rectangular park is 7 : 5. A man runs along its boundary at 8 km/hr and takes 9 minutes for one round. Find its area in sq. meters.
উত্তর
87500 sq. m.
৮২৯৬
Tk. 8000 becomes Tk. 9600 in 2 years at a certain rate of simple interest. If the rate becomes double, what will be the total amount in 5 years on the same principal?
উত্তর
Tk. 18500
৮২৯৭
Find the equation of the vertical line passing through the point (7, - 4).
উত্তর
x = 7
৮২৯৮
If the average of m numbers is n2 and the average of n numbers is m2, find the average of all (m + n) numbers.
উত্তর
mn
৮২৯৯
xP and Q started a business investing in the ratio 3 : 5. After 3 years, P withdrew his capital. Q continued alone for 2 more years. If the total profit after 5 years is Tk. 34,000 what is P’s share of the profit?
উত্তর
Tk. 9000
৮৩০০
A metal sphere weighing 120 kilograms is melted and recast into 6000 identical nails. Calculate the weight of each nail in grams.
উত্তর
20 grams