How many years will Tk. 1500 need at 4% simple interest to earn the same interest as Tk. 2000 earns in 3 years at 5% simple interest?
A
4 years
B
5 years
C
6 years
D
8 years
উত্তরের বিবরণ
Solution:
Interest from Tk. 2000 in 3 years at 5%:
SI = (P × R × T)/100
= (2000 × 5 × 3)/100
= 300 Tk.
Now,
Tk. 1500 to Produce the Same Interest (Tk. 300) at 4%:
Principal, P = Tk. 1500
Interest, SI = Tk. 300
Interest Rate, R = 4%
Time, T = ? years
SI = PRT/100
⇒ T = (SI × 100)/(P × R)
⇒ T = (300 × 100)/(1500 × 4)
⇒ T = 30000/6000
∴ T = 5 years
0
Updated: 2 months ago
বার্ষিক ৫% সরল মুনাফায় ৬৫০০ টাকার ৩ বছরের মুনাফা কত টাকা?
Created: 2 weeks ago
A
৯৭৫ টাকা
B
১০০০ টাকা
C
৯৫০ টাকা
D
১১২০ টাকা
প্রশ্ন: বার্ষিক ৫% সরল মুনাফায় ৬৫০০ টাকার ৩ বছরের মুনাফা কত টাকা?
সমাধান:
দেওয়া আছে,
মূলধন, P = ৬৫০০ টাকা
সময়, n = ৩ বছর
মুনাফার হার, r = ৫%
আমরা জানি,
সরল মুনাফা = Pnr/১০০
= (৬৫০০ × ৩ × ৫)/১০০
= ৬৫ × ৩ × ৫
= ৯৭৫
অর্থাৎ সুদের পরিমাণ = ৯৭৫ টাকা
0
Updated: 2 weeks ago
How much water should be added to 80 liters of pure milk to gain extra 20% profit when selling the mixture at the price of pure milk?
Created: 3 weeks ago
A
6 liters
B
12 liters
C
8 liters
D
16 liters
Question: How much water should be added to 80 liters of pure milk to gain extra 20% profit when selling the mixture at the price of pure milk?
Solution:
Let’s assume,
Price of pure milk per liter = 100 Taka
So, the price of 50 liters of pure milk = 100 × 80 = 8000 Taka
Now assume,
Water added to the milk = x liters
Then the total quantity of the milk-water mixture = (80 + x) liters
Since the mixture is sold at the price of pure milk,
The selling price of (80 + x) liters = 100(80 + x) Taka
According to the question,
100(80 + x) = 8000 + 8000 of 20%
⇒ 8000 + 100x = 8000 + {8000 × (20/100)}
⇒ 8000 + 100x = 8000 + 1600
⇒ 8000 - 8000 + 100x = 1600
⇒ 100x = 1600
⇒ x = 1600/100
⇒ x = 16
∴ Amount of water to be added = 16 liters
0
Updated: 3 weeks ago
A shopkeeper marks his goods 40% above the cost price and offers a discount of 20% on the marked price. What is his gain percent?
Created: 3 weeks ago
A
12%
B
17%
C
9%
D
15%
Question: A shopkeeper marks his goods 40% above the cost price and offers a discount of 20% on the marked price. What is his gain percent?
Solution:
Let,
the cost price (CP) be Tk. 100
Marked Price = 40% more than cost price
= 100 + 40
= 140 Tk.
Discount = 20% of 140
= (20/100) × 140
= 28 Tk.
Selling Price (SP)= 140 - 28 = 112 Tk.
∴ Profit = SP - CP = 112 - 100 = 12 Tk.
∴ Gain percent = 12%
0
Updated: 3 weeks ago
