Two pipes A and B can fill a tank in 20 hours and 30 hours respectively. If both the pipes are opened simultaneously, in how much time the tank will be filled completely?
Part filled by A in 1 hour = 1/20 ⇒ Part filled by B in 1 hour = 1/30 ⇒ Part filled by ( A + B) in 1 hour = 1/20 + 1/30 = 5/60 = 1/12 ∴ Hence, both the pipes together will fill the tank in 12 hours.
Which of the following countries has/have the system of Judicial review?
The average wage of a group of 20 labourers is Rs. 450. If 4 persons receiving average wage of Rs. 500 leave the group and 2 persons receiving average w...
The flowers in a basket become double every minute and the basket gets full in one hour. In how much time, the basket was 1/32 full?
There is a rectangular paper, whose length and breadth are in the ratio 5:2, respectively and it has a perimeter of 70 metres. If a triangular piece wit...
Bacteria and viruses cause
First-ever national level Khelo India Women’s Hockey League (Under 21) inaugurated at which of the following Places in Dec 2021?
Consider the following statement(s) about “Article 19” of the Indian Constitution:
1. These rights are protected only against the State and n...
The respective ratio of the present ages of A and B is 5:3. The present age of C is 20% more than that of B. The sum of the present ages of A, B and C i...
In which of the following session Muslim league passed a resolution for the establishment of a separate homeland for the Muslims of British India?
Which of the following financial ratios measures a company's efficiency in managing its inventory?