Ehsan can mow the lawn in 30 minutes, and together with his brother Asif, they can mow the lawn in 20 minutes. How long would it take for Asif working alone to mow the lawn?

A 1/2 hour
B 3/4 hour
C 1 hour
D 3/2 hours

Correct Answer: 1 hour

Ehsan 30 মিনিটে ঘাস কাটতে পারে এবং তার ভাই Asif এর সাথে একত্রে ঘাস কাটতে পারে 20 মিনিটেEshan 1 মিনিটে ঘাস কাটতে পারে <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>1</mn><mn>30</mn></mfrac></math>Asif একা 1 মিনিটে ঘাস কাটতে পারে<math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>(</mo><mfrac><mn>1</mn><mn>20</mn></mfrac><mo> - </mo><mfrac><mn>1</mn><mn>30</mn></mfrac><mo>)</mo><mo> = </mo><mfrac><mrow><mn>3</mn><mo> - </mo><mn>2</mn></mrow><mn>60</mn></mfrac><mo> = </mo><mfrac><mn>1</mn><mn>60</mn></mfrac></math>1 বা সমস্ত " " " ৬০ মিনিটে বা 1 hour এ
Bissoy MCQ
#গণিত #Dhaka Bank Ltd #Dhaka Bank Ltd - Trainee Officer - 24.06.2016

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