30 workers can build 60 machines working 4 hours per day. How many extra workers are required to produce 90 machines working 6 hours per day?
A
0 workers
B
10 workers
C
20 workers
D
15 workers
উত্তরের বিবরণ
Question: 30 workers can build 60 machines working 4 hours per day. How many extra workers are required to produce 90 machines working 6 hours per day?
Solution:
4 hours to build 60 machines by 30 workers
1 hour to build 1 machine by = (30 × 4)/60 workers
6 hours to build 90 machines by = (2 × 90)/6 workers
= 30 workers
∴ extra workers = (30 - 30) = 0 workers
0
Updated: 2 weeks ago
A machine produces 240 toys in 4/3 hours. How many toys can it produce in 25 minutes?
Created: 1 week ago
A
60 toys
B
75 toys
C
80 toys
D
90 toys
Question: A machine produces 240 toys in 4/3 hours. How many toys can it produce in 25 minutes?
Solution:
Given,
Time = 4/3 hours = (4/3) × 60 = 80 minutes
In 80 minutes, the number of toys produced = 240
In 1 minute, the number of toys produced = 240/80 = 3
In 25 minutes, the number of toys produced = 3 × 25 = 75
∴ The machine can produce 75 toys in 25 minutes.
0
Updated: 1 week ago
A canteen requires 105 kgs of wheat for a week. How many kgs of wheat will it require for 58 days?
Created: 2 weeks ago
A
840 kgs
B
950 kgs
C
620 kgs
D
870 kgs
Question: A canteen requires 105 kgs of wheat for a week. How many kgs of wheat will it require for 58 days?
Solution:
For 7 days it is required = 105 kgs
∴ For 1 days it is required = (105/7) kgs
∴ For 58 days it is required = (105 × 58)/7 = 870 kgs
∴ 870 kilograms of wheat will be required for 58 days.
0
Updated: 2 weeks ago
A can complete a piece of work in 6 days working 8 hours a day, and B can complete the same work in 12 days working 8 hours a day. How long will it take them to complete the work together if they work 4 hours a day?
Created: 2 weeks ago
A
6 days
B
5 days
C
10 days
D
8 days
Question: A can complete a piece of work in 6 days working 8 hours a day, and B can complete the same work in 12 days working 8 hours a day. How long will it take them to complete the work together if they work 4 hours a day?
Solution:
A can complete the work in 8 × 6 = 48 hours
1 hour's work of A = 1/48 part
B can complete the work in 8 × 12 = 96 hours
1 hour's work of B = 1/96 part
(A + B)'s 1 hour's work = (1/48) + (1/96) part
= (2 + 1)/96 part
= 3/96 part
= 1/32
∴ Time taken by (A + B) working 4 hours daily = 32/(1 × 4)
= 8 days
0
Updated: 2 weeks ago
