A
45
B
81
C
90
D
135
উত্তরের বিবরণ
প্রশ্ন: 261টি আম তিন ভাইয়ের মধ্যে 1/3 : 1/5 : 1/9 অনুপাতে ভাগ করে দিলে প্রথম ভাই কতটি আম পাবে?
সমাধান:
আম পাওয়ার অনুপাত = 1/3 : 1/5 :1/9
= (1/3) × 45 : (1/5) × 45 : (1/9) × 45
= 15 : 9 : 5
অনুপাতের রাশিগুলোর যোগফল = (15 + 9 + 5) = 29
অতএব, প্রথম ভাই পাবে, = 261 × (15/29) = 135
0
Updated: 2 days ago
A ferry can carry 25 trucks or 40 motorcycles at a time. If there are 15 trucks on the ferry, how many motorcycles can be loaded onto it?
Created: 2 weeks ago
A
18 motorcycles
B
8 motorcycles
C
12 motorcycles
D
16 motorcycles
গণিত
অনুপাত - সমানুপাত (Ration-Proportion-Algebra)
অনুপাত-সমানুপাত (Ratio-Proportion)
No subjects available.
Question: A ferry can carry 25 trucks or 40 motorcycles at a time. If there are 15 trucks on the ferry, how many motorcycles can be loaded onto it?
Solution:
Here,
25 trucks = 40 motorcycles
∴ 1 trucks = 40/25 = 8/5 motorcycles
∴ 15 trucks = = (8 × 15)/5 = 24 motorcycles
∴ Required number of motorcycles = 40 - 24 = 16
So the ferry can carry 16 more motorcycles along with the 15 trucks.
0
Updated: 2 weeks ago
A certain principal amount, invested at simple interest, grows to Tk. 815 after 3 years and Tk. 854 after 4 years. What is the original principal amount?
Created: 4 weeks ago
A
Tk. 658
B
Tk. 612
C
Tk. 698
D
Tk. 710
Solution:
Given,
Amount after 3 years = Tk. 815
Amount after 4 years = Tk. 854
∴ Interest for 1 year = 854 - 815 = Tk. 39
∴ Interest for 3 years = 39 × 3 = Tk. 117
∴ Principal = 815 - 117 = Tk. 698
0
Updated: 4 weeks ago
A mixture contains copper, zinc, and tin in the ratio 2 : 3 : 5. If the total weight of the mixture is 50 grams, how many grams of tin are there in the mixture?
Created: 4 weeks ago
A
20 grams
B
15 grams
C
10 grams
D
25 grams
Solution:
Given,
Copper : Zinc : Tin = 2 : 3 : 5
Total parts = 2 + 3 + 5 = 10
Weight of tin = (5/10) × 50 = 25 grams
0
Updated: 4 weeks ago
