A man and a boy can do in 15 days a piece of work which could be done by 7 men and 9 boys in 2 days. In how many days could one man finish the work alone? A. 20 days C. 60 days B. 30 days D. 50 days Solution Click here to… Jhun Vert Fri, 07/05/2024 - 06:15 Solution Click here to expand or collapse this section $\dfrac{1}{M} + \dfrac{1}{B} = \dfrac{1}{15}$ ← Eq. (1) $\dfrac{7}{M} + \dfrac{9}{B} = \dfrac{1}{2}$ ← Eq. (1) Using your scientific calculator $\dfrac{1}{M} = \dfrac{1}{20}$ $M = 20 ~ \text{days}$ Log in or register to post comments Log in or register to post comments
Solution Click here to… Jhun Vert Fri, 07/05/2024 - 06:15 Solution Click here to expand or collapse this section $\dfrac{1}{M} + \dfrac{1}{B} = \dfrac{1}{15}$ ← Eq. (1) $\dfrac{7}{M} + \dfrac{9}{B} = \dfrac{1}{2}$ ← Eq. (1) Using your scientific calculator $\dfrac{1}{M} = \dfrac{1}{20}$ $M = 20 ~ \text{days}$ Log in or register to post comments
Solution Click here to…