kojo-can-do-a-piece-of-work-in-5hours-Edina-can-do-the-same-work-in-4hours-how-long-will-it-take-the-two-of-them-to-do-the-same-work-together-if-they-work-at-the-same-rate-

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Question Number 176270 by otchereabdullai@gmail.com last updated on 15/Sep/22

$$\mathrm{kojo}\mathrm{can}\mathrm{do}\mathrm{a}\mathrm{piece}\mathrm{of}\mathrm{work}\mathrm{in}5\mathrm{hours}$$$$\mathrm{Edina}\mathrm{can}\mathrm{do}\mathrm{the}\mathrm{same}\mathrm{work}\mathrm{in}$$$$4\mathrm{hours}.\mathrm{how}\mathrm{long}\mathrm{will}\mathrm{it}\mathrm{take}\mathrm{the}\mathrm{two}$$$$\mathrm{of}\mathrm{them}\mathrm{to}\mathrm{do}\mathrm{the}\mathrm{same}\mathrm{work}\mathrm{together}$$$$\mathrm{if}\mathrm{they}\mathrm{work}\mathrm{at}\mathrm{the}\mathrm{same}\mathrm{rate}$$$$$$

Commented by mr W last updated on 15/Sep/22

$$kojodoes\frac{1}{5}inahour.$$$$edinadoes\frac{1}{4}inahour.$$$$togethertheydo\frac{1}{5}+\frac{1}{4}inahour,$$$$theyneed\frac{1}{\frac{1}{5}+\frac{1}{4}}=\frac{20}{9}\approx 2.2hours$$

Commented by otchereabdullai@gmail.com last updated on 15/Sep/22

$$\mathrm{God}\mathrm{bless}\mathrm{you}\mathrm{profW}$$

Commented by Tawa11 last updated on 18/Sep/22

$$\mathrm{Great}\mathrm{sir}$$

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