Start learning 50% faster. Sign in now
ATQ,
Let the total work be the LCM of [10, 15, 20] = 60 units. Efficiency of ‘P’ = 60/10 = 6 units/day. Efficiency of ‘Q’ = 60/15 = 4 units/day. Efficiency of ‘R’ = 60/20 = 3 units/day. Work done on the first day = 6 × 1 = 6 units. Work done on the second day = (6 + 4) × 1 = 10 units. Work done on the third day = (6 + 3) × 1 = 9 units. Total work done in the first three days = 6 + 10 + 9 = 25 units. Remaining work = 60 – 25 = 35 units. Time taken to complete the remaining work = (6/6) + (10/10) + (9/9) + (10/17) ≈ 3 + (10/17) ≈ 3.59 days. Total time = 3 + 3.59 = 6.59 days.
A pond of water appears less deep due to –
The process involved in making soap is
The law of reflection states that the angle of incidence is equal to the angle of reflection. What is the angle of incidence when the angle of reflectio...
In a long solenoid of 200 turns/cm carrying a current i, the magnetic field at center is 6.28×10-2 T. If a second solenoid with 100 turns/c...
In a Young’s double slit experiment, a glass plate is introduced in front of one slit. The central fringe shifts but the fringe width remains unchange...
A beam of light consisting of two wavelengths, 600 nm and 420 nm, is used to obtain interference fringes in a Young’s double-slit experiment. Find...
A parallel plate capacitor is half-filled with a dielectric slab (K = 4). What is its effective capacitance, assuming plate separation d?
Which of the following decays does not change the atomic number of the nucleus?
Calculate the work done in moving a charge of 2 C across two points having a potential difference of 12 V.
The pitch of a sound is determined by its: