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10 machines can wash 20 cars in 6 hours. In how many hours can 15 machines wash 40 cars?
- a)8
- b)7
- c)15
- d)12
- e)6
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
10 machines can wash 20 cars in 6 hours. In how many hours can 15 mach...
A) 8
Explanation: Washing cars is a work, so M1*H1*W2 = M2*H2*W1
10*6*40 = 15*H2*20
Solve, H2 = 8 hrs
Explanation: Washing cars is a work, so M1*H1*W2 = M2*H2*W1
10*6*40 = 15*H2*20
Solve, H2 = 8 hrs
Most Upvoted Answer
10 machines can wash 20 cars in 6 hours. In how many hours can 15 mach...
A) 8
Explanation: Washing cars is a work, so M1*H1*W2 = M2*H2*W1
10*6*40 = 15*H2*20
Solve, H2 = 8 hrs
Explanation: Washing cars is a work, so M1*H1*W2 = M2*H2*W1
10*6*40 = 15*H2*20
Solve, H2 = 8 hrs
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Community Answer
10 machines can wash 20 cars in 6 hours. In how many hours can 15 mach...
Given:
- 10 machines can wash 20 cars in 6 hours
To find:
- In how many hours can 15 machines wash 40 cars?
Solution:
- Let's assume that the amount of work done by the machines is directly proportional to the number of machines and the time for which they work.
- Therefore, we can write that:
Machines × Time = Constant
10 × 6 = 15 × t (where t is the time taken for 15 machines to wash 40 cars)
- Solving for t, we get:
t = (10 × 6) / 15
= 4 hours
- Therefore, 15 machines can wash 40 cars in 4 hours.
Answer:
- Option A) 8 is incorrect.
- The correct answer is option A) 4.
- 10 machines can wash 20 cars in 6 hours
To find:
- In how many hours can 15 machines wash 40 cars?
Solution:
- Let's assume that the amount of work done by the machines is directly proportional to the number of machines and the time for which they work.
- Therefore, we can write that:
Machines × Time = Constant
10 × 6 = 15 × t (where t is the time taken for 15 machines to wash 40 cars)
- Solving for t, we get:
t = (10 × 6) / 15
= 4 hours
- Therefore, 15 machines can wash 40 cars in 4 hours.
Answer:
- Option A) 8 is incorrect.
- The correct answer is option A) 4.
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10 machines can wash 20 cars in 6 hours. In how many hours can 15 machines wash 40 cars?a)8b)7c)15d)12e)6Correct answer is option 'A'. Can you explain this answer?
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