In how many years will Tk. 750 amount to Tk. 900 at 4% simple interest per annum?
A
3.5 years
B
3 years
C
4.5 years
D
5 years
উত্তরের বিবরণ
Solution:
Simple Interest = Amount - Principal
= 900 - 750
= 150
Here,
Principal, P = 750
Interest Rate, R = 4%
SI = 150
Time, T = ?
SI = PRT/100
⇒ T = (SI × 100)/(P × R)
= (150 × 100)/(750 × 4)
= 15000/3000
= 5 years
0
Updated: 2 months ago
একটি ব্যাংকে নির্দিষ্ট পরিমাণ টাকা জমা রাখলে জমাকৃত টাকা সরল মুনাফায় ৩ বছরে ৪/৩ অংশ হয়। ব্যাংকের মুনাফার হার কত?
Created: 3 weeks ago
A
১৪%
B
১৩.১৩%
C
১৬%
D
১১.১১%
প্রশ্ন: একটি ব্যাংকে নির্দিষ্ট পরিমাণ টাকা জমা রাখলে জমাকৃত টাকা সরল মুনাফায় ৩ বছরে ৪/৩ অংশ হয়। ব্যাংকের মুনাফার হার কত?
সমাধান:
ধরি,
মূলধন = P
মুনাফা = I
আমরা জানি,
মুনাফা-আসল = I + P
⇒ মূলধনের ৪/৩ অংশ = I + P
⇒ P × (৪/৩) = I + P
⇒ I = (৪P/৩) - P
⇒ I = (৪P - ৩P)/৩
⇒ I = P/৩
∴ মুনাফা, I = Pnr/১০০
⇒ P/৩ = (P × ৩ × r)/১০০
⇒ r = (১০০ × P)/(P × ৩ × ৩)
⇒ r = ১০০/৯ = ১১.১১
অর্থাৎ মুনাফার হার = ১১.১১ %
0
Updated: 3 weeks ago
The price of cooking oil is reduced by 10%. A family buys 4 litres more for Tk. 720 after the reduction. What was the original price per litre?
Created: 3 weeks ago
A
45 Tk/litre.
B
40 Tk/litre.
C
20 Tk/litre.
D
35 Tk/litre.
Question: The price of cooking oil is reduced by 10%. A family buys 4 litres more for Tk. 720 after the reduction. What was the original price per litre?
Solution:
Let
Original price of cooking oil = x Tk/litre.
Original quantity = 720/x litre
New price = 0.90x Tk/litre
New quantity = 720/0.90x = 720/(9x/10) = (720 × 10)/9x = 800/x litre
ATQ,
(800/x) - (720/x) = 4
⇒ (800 - 720)/x = 4
⇒ 80/x = 4
⇒ x = 80/4
∴ x = 20
∴ Original price of cooking oil = 20 Tk/litre.
0
Updated: 3 weeks ago
Aysha and Jara started a business by investing Tk. 85000 and Tk. 15000 each. What be will the ratio of profit earned after 2 years between Aysha and Jara respectively?
Created: 3 weeks ago
A
9 : 8
B
17 : 5
C
5 : 4
D
17 : 3
Question: Aysha and Jara started a business by investing Tk. 85000 and Tk. 15000 each. What be will the ratio of profit earned after 2 years between Aysha and Jara respectively?
Solution:
Given,
Aysha's investment = Tk. 85,000
Jara's investment = Tk. 15,000
Time = 2 years for both
The ratio of profit earned after 2 years between Aysha and Jara respectively = (85000 × 2) : (15000 × 2)
= 170000 : 30000
= 17 : 3
0
Updated: 3 weeks ago
