Question
A, B and C can do a job working alone in 50, 75 and 20
days respectively. They all work together for 4 days, then C quits. How many days will A and B take to finish the rest of the job?Solution
LCM of 50,75 an 20 is 300 units Each day A can do 300/50 =6 units Each day B can do 300/75 =4 units Each day A can do 300/20 =15 units In each day 6+4+15=25 units for 4 days they do 4*25=100 units Each day A and B an together do 10 units Therefore 200/10 =20 days
A particle enters a uniform magnetic field at some angle other than 90° or 0° to the field. The path followed by the particle is:
Which of the following elements have the lowest and highest boiling point in the Periodic table?
What is the smallest unit of the kidney called?
In which part of the chloroplast does the light reaction occur?
Which disease is caused by Plasmodium parasite?
What is the life span of RBC?
A mass m is suspended from a spring of spring constant k and oscillates with amplitude A. The maximum velocity during oscillation is:
Which of the following statement is correct?
I. Blood is a type of connective tissue
II. Bone is a type of connective tissue
Metalloids are
A gas is compressed at constant temperature. Which of the following will decrease?
