Question and Answers Forum

All Questions      Topic List

UNKNOWN Questions

Previous in All Question      Next in All Question      

Previous in UNKNOWN      Next in UNKNOWN      

Question Number 99358 by PengagumRahasiamu last updated on 20/Jun/20

15 men can complete a work in 10 days,  working 8 hrs. per day. How many  persons are required to complete  double the work in 25 days, working  6 hrs. per day?

$$\mathrm{15}\:\mathrm{men}\:\mathrm{can}\:\mathrm{complete}\:\mathrm{a}\:\mathrm{work}\:\mathrm{in}\:\mathrm{10}\:\mathrm{days}, \\ $$$$\mathrm{working}\:\mathrm{8}\:\mathrm{hrs}.\:\mathrm{per}\:\mathrm{day}.\:\mathrm{How}\:\mathrm{many} \\ $$$$\mathrm{persons}\:\mathrm{are}\:\mathrm{required}\:\mathrm{to}\:\mathrm{complete} \\ $$$$\mathrm{double}\:\mathrm{the}\:\mathrm{work}\:\mathrm{in}\:\mathrm{25}\:\mathrm{days},\:\mathrm{working} \\ $$$$\mathrm{6}\:\mathrm{hrs}.\:\mathrm{per}\:\mathrm{day}? \\ $$

Commented by john santu last updated on 20/Jun/20

16 persons

$$\mathrm{16}\:\mathrm{persons} \\ $$

Answered by john santu last updated on 20/Jun/20

⇒15 × 8 × 10 = 1 work   ⇒ t × 6 × 25 = 2 work   ⇔(15×8×10)×2 = t × 6 × 25   t = ((150 × 16)/(150)) = 16 persons

$$\Rightarrow\mathrm{15}\:×\:\mathrm{8}\:×\:\mathrm{10}\:=\:\mathrm{1}\:\mathrm{work}\: \\ $$$$\Rightarrow\:\mathrm{t}\:×\:\mathrm{6}\:×\:\mathrm{25}\:=\:\mathrm{2}\:\mathrm{work}\: \\ $$$$\Leftrightarrow\left(\mathrm{15}×\mathrm{8}×\mathrm{10}\right)×\mathrm{2}\:=\:\mathrm{t}\:×\:\mathrm{6}\:×\:\mathrm{25}\: \\ $$$$\mathrm{t}\:=\:\frac{\mathrm{150}\:×\:\mathrm{16}}{\mathrm{150}}\:=\:\mathrm{16}\:\mathrm{persons}\: \\ $$

Terms of Service

Privacy Policy

Contact: info@tinkutara.com