For the following questions answer them individually
If the annual rate of simple interest increased from 8% to $$12\frac{1}{2}\%$$, a person's yearly income increased by ₹459. The principal amount (in ₹) is:
'A' can complete the 60% of the work in 9 days, while 'B' can complete the work in $$7\frac{1}{2}$$ days. If they work together, then in how many days will the work be completed?
An open tank is 25 m long. 12 m wide and 6 m deep. The cost (in ₹) of plastering its walls and bottom from the inside at ₹15 per $$m^{2}$$ is:
The sum of the cost price of two bikes is ₹50,000. The first bike was sold at a profit of 20%, and the second bike at a loss of 20%. If the selling prices are the same, what is the cost price (in ₹) of the first bike that was sold?
The toal number of students in class A and B is 72. The number of students in A is 40% more than that in B. The average marks of students in B are 50% more than that of students in A. If the average marks of all the students in A and B are 58, then what are the average marks of students in B?
What is the melting point of ice at the sea-level at normal atmospheric pressure and at
45 degree latitude?
