Question
P is 60% more efficient than Q. P takes 30 more days to
finish a work as compared to the number of days taken by P and Q together to finish the same work. Find the time taken by Q to finish the same work alone.Solution
Let efficiency of P = p and efficiency of Q = q p = 160% of q => p: q = 8: 5 Let time required by P and Q together to finish this job be “t”. (p + q) ×t = W => 13x × t = W …. (1) ATQ- p × (t + 30) = W => 8x × (t + 30) = W … (2) By solving above two equations we get t = 48 13x × 48 = 5x × T => T = 124.8 days
What does 'IC' stand for in electronics?
A particle moves along the x-axis such that its velocity varies with position as
v(x) = k√(a2 – x2)
where k...
A light ray enters a glass slab from air at 60° incidence. If refractive index of glass is √3, what is angle of refraction?
What process causes white light to split into its constituent colors?
A stream of water flowing horizontally with a speed of 20 m/s pushes out of a tube of cross-sectional area 10-1m2 and hits at a v...
An ant can see objects all around it due to the presence of which type of eyes?
A body of mass 2 kg is moving with velocity 3 m/s. What is its kinetic energy?
Which conservation law is violated in nuclear beta decay if neutrinos are not considered?
When do spring tides occur?
A boy is standing in front of a plane mirror at a distance of 3 m from it. What is the distance between the boy and his image?
Relevant for Exams:
