২২৮৪১
You can now buy 5 more Mangoes with Tk. 75 due to reduction in price by 20 percent. Calculate the current price of one dozen of Mangoes.
উত্তর
36
সমাধান
For Tk.100 reduction in price Tk.20
For Tk.75. " " " (20 * 75)/100
Price of 5 mangoes is tk 15
" " 12 " " (15 * 12)/5 = Tk.36
২২৮৪২
A wholesaler sells goods to a retailer at a profit of 20%. The retailer sells to the customer, who pays 80% more than the cost of the wholesaler. What is the retailer's profit?
উত্তর
50%
২২৮৪৩
If x +y =6 y +z = 4 and z +x = 2 then 2y -z -x?
উত্তর
6
সমাধান
Given,
x + y = 6
y + z = 4
z + x = 2
so, 2(x + y + z) = 12
বা, x + y + z = 6
বা, y + 2 = 6
so, y = 4
2y - z - x = 2 * 4 - 2 = 6
২২৮৪৪
Business Partners, A, B and C agree to divide their total profit for the year in the ratios 4: 7: 8 respectively. If A's share of the profit is Tk. 16,000, what was the total profit of the business partners for the year?
উত্তর
Tk. 76,000
সমাধান
Let the total profit be P.
Then, A's share, 4 / (4 + 7 + 8) × P = 16000
or, P = 16000 × 19 / 4 = 76000 TK
২২৮৪৫
Out of total profit, A gets 40% , B 25% , C 20% , D 10% and E 5%. A's profit is what percentage of that of B?
উত্তর
160%
সমাধান
Lets, A profit is x% of that of B
so, 40% = x of 25 %
40/100 = x/100 of 25 /100
40/100 = (x×25) /(100×100)
x × 25 = ( 40×100×100) /100
x = ( 4×100)/25
x = 160
২২৮৪৬
per day wage rate of workers is reduced 50% due to economic slowdown. After one year, the wage rate is increased by 60%. If the per day wage rate before the decrease was Tk. 100, then what is the per day wage rate now?
উত্তর
80
সমাধান
After 50% reduce
New wage = 100 - (50/100) * 100 = Tk.50
After 60% increased
New wage = 50 + 60/100 * 50 = Tk.80
২২৮৪৭
Two-third of the faculty members of a department are female. Twelve of the male teachers are unmarried, while 60% of them are married. The total number of faculty members in the department is:
উত্তর
90
সমাধান
Suppose, Total Member = Pfemale = 2P/3 male = 1-2P/3 = P/3P/3 * 40% = 12P * 40 3 * 100 = 12 P = 12 * 3 * 10040 P = 90Total Member = 90 (Ans.)
২২৮৪৮
If A and B are positive and A > B which of the following is true?
উত্তর
-B/a> -A/B
সমাধান
- B /A > - A/B
২২৮৪৯
Sum of the two numbers is 21 and their difference is 7. what is the half of the greater number?
উত্তর
7
সমাধান
Let, greater number x
lower number y
x + y = 21
x - y = 7
so, 2x = 28
so, x = 14
x/2 = 7
২২৮৫০
A train passes city X at 9.55 am and city Y at 10.15 am. The distance between cities X and Y is 45 miles. What is the average speed, in miles per hour, of the train?
উত্তর
135