If 6 men can build a wall in 8 days, how many days will 12 men take to build the same wall?
A
4 days
B
6 days
C
8 days
D
10 days
উত্তরের বিবরণ
Question: If 6 men can build a wall in 8 days, how many days will 12 men take to build the same wall?
Solution:
6 জন লোক একটি দেয়াল 8 দিনে তৈরি করতে পারে।
1 জন লোক সেই দেয়াল তৈরি করতে লাগবে = (8 × 6) দিন
12 জন লোক সেই দেয়াল তৈরি করতে লাগবে = (8 × 6)/12 দিন
= 4 দিন
0
Updated: 1 month ago
A man completes 2/5 of a work in 8 days. If his work rate is doubled, how many more days will it take him to finish the remaining work?
Created: 1 month ago
A
3 days
B
6 days
C
4 days
D
8 days
Question: A man completes 2/5 of a work in 8 days. If his work rate is doubled, how many more days will it take him to finish the remaining work?
Solution:
2/5 of the work is done in = 8 days
∴ full work is done in = (8 × 5)/2 days
= 20 days
∴ His daily work rate = 1/20 per day
If his work rate is doubled, his new daily work rate is,
= (1/20) × 2 = 1/10 per day
Remaining portion of the job = 1 - (2/5)
= 3/5
Now,
1/10 work is done in = 1 day
∴ 3/5 work is done in = (3/5) ÷ (1/10) days
= (3/5) × 10
= 6 days
Therefore, it will take him 6 more days to finish the job.
0
Updated: 1 month ago
15 workers can build 45 chairs working 6 hours per day. How many extra workers are required to produce 60 chairs working 4 hours per day?
Created: 1 month ago
A
0 workers
B
10 workers
C
12 workers
D
15 workers
Question: 15 workers can build 45 chairs working 6 hours per day. How many extra workers are required to produce 60 chairs working 4 hours per day?
Solution:
6 ঘণ্টা কাজ করে 45টি চেয়ার তৈরি করে 15 জন শ্রমিক
1 ঘণ্টা কাজ করে 1টি চেয়ার তৈরি করে = (15 × 6) /45 জন শ্রমিক
4 ঘণ্টা কাজ করে 60টি চেয়ার তৈরি করে = (15 × 6 × 60)/(45 × 4) জন শ্রমিক
= 30 জন
∴ অতিরিক্ত শ্রমিকের সংখ্যা = 30 - 15 = 15 জন
0
Updated: 1 month ago
3/7 part of the tank is full of water. When 42 liters of water is taken out, the tank becomes empty. The capacity of the tank is -
Created: 2 months ago
A
82 liters
B
66 liters
C
78 liters
D
98 liters
Question: 3/7 part of the tank is full of water. When 42 liters of water is taken out, the tank becomes empty. The capacity of the tank is -
Solution:
Let us consider,
The tank has 7x liters of total capacity and holds 3x litres of water.
And if 42 liters of water is taken out, then the tank becomes empty.
It means 3x litres of water is taken out.
∴ 3x = 42 liters
⇒ x = 14 liters
∴ Capacity of tank = 7x = 7 × 14 = 98 liters
0
Updated: 2 months ago
