Question
Which of the following gases in air is responsible for
the discoloration of Brass?Solution
Brass gets discolored in the air due to the presence of hydrogen sulphide. It is due to the presence of the mixture of hydrogen and sulphide that makes Brass discolored.
Find the fourth proportional to 2, 3, 6.
A clock has a cost price of Rs. 1,800. It is marked at a price that is 50% higher than the cost price and then sold after two consecutive discounts of 1...
Find the unit digit of 3323 + 4235
- ‘m’ is the number of prime numbers from 1 to 100 and ‘n’ is the number of prime factors from 101 to 125. Find the value of m × n.
The speed of a boat in still water and the speed of the stream are in the ratio of 5:2. If the boat's speed while moving downstream is 84 km/hr, how lon...
The average weight of certain number of students in a class is 72 kg. 8 students whose average weight is 75 kg left the class and 3 students whose avera...
Find the LCM of 34 and √784.
A man complete a journey in 15 hours. He travels first half of the journey at the rate of 6 km/hr and second half at the rate of 4 km/hr. Find the total...
Which of the following statements is / are true?
Simplify the following expression: (5x + 7) 2 + (5x – 7) 2 .
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