The time taken to do a piece of work is inversely proport...
The time taken to do a piece of work is inversely proportional to the number of men employed. if it takes 45 men to do a piece of work in 5 days, how long will it take 25 men?
15 days
12 days
5 days
9 days
Correct answer is D
The time (t) to do the work is inversely proportional to the number of workers (n).
⟹t∝1n
t=kn
5=k45⟹k=45×5=225
∴
For 25 men, t = \frac{225}{25} = 9
\therefore 25 men will do the work in 9 days.
Correct 0.007985 to three significant figures. ...
Find the equation of a line which is form origin and passes through the point (−3, −4) ...
IN the diagram, |LN| = 4cm, LNM = 90o and tan y = 2/3. What is the area of the ∆LMN?...
Find p, q for which \begin{pmatrix} 2p & 8 \\ 3 & -5q \end{pmatrix}\(\begin{pmatrix} 1 \...
The values of x when y = -1 are approximately ...
Simplify \frac{(a^2 - \frac{1}{a}) (a^{\frac{4}{3}} + a^{\frac{2}{3}})}{a^2 - \frac{1}{a}^2}...
Using the cumulative frequency curve, estimate the median of the data represented on the graph. ...