Question
Which of the following statements is/are correct?
a. Better the medium for growth for the microorganisms, more heat resistant are the cells or spores b. A small amount of glucose in a medium may lead to increased heat resistant of the microorganisms c. Mg2+ is said to increase the heat resistance of the bacterial spores d. Mg2+ is said to decrease the heat resistance of the bacterial sporesSolution
Mg2+ decreases heat resistance of microorganisms whereas glucose increases the heat resistance and the more better the medium is for heat resistance, the more heat resistant the cells growing in it are.
If 'A' needs 24 more days to complete a certain task working alone compared to when 'A' and 'B' work together, and 'A' is 50% more efficient than 'B', w...
‘A’ can do a piece of work in 12 days. ‘B’ can do 60% of the same work in 18 days. If they work together for the entire time and get paid Rs.154...
30 men can complete a task in 160 days. 12 men start the work and manage to do half of it. Then, 18 more men are added to the team to help finish the wo...
- Raj alone can complete a work in 25 days. Mohan is five times as efficient as Raj. Find the percentage of work completed by Raj and Mohan together in 5 day...
P can do a piece of work in 20 days, Q can complete double the work in 40 days and R can do the work in 30 days. If all of them together earn Rs. 3200, ...
Suppose Y individuals can complete a task in (Y - 28) days, and (Y + 12) individuals can finish the same task in (Y - 32) days, what is the number of da...
‘A’ can do a piece of work in 20 days. ‘B’ can do 80% of the same work in 30 days. If they work together for the entire time and get paid Rs.161...
‘A’ can complete a work in 15 days and is 50% more efficient than ‘B’. ‘A’ and ‘B’ start working together and ‘A’ leaves after 8 day...
The efficiency of P is 80% of the efficiency of Q. If Q can type 150 pages in 30 days, then find the number of days taken by P alone to type 300 pages.
A can finish a job in 20 days while B can finish same job in 30 days. A and B both worked for 5 days and C joins them. In next 3.5 days, all three have ...
