if a+b+c=7 and a³+b³+c³-3abc=175, then what is the value of (ab+bc+ca)?

Directions:  Study the bar-graph given below & answer the questions.
Pie-chart given below shows the percentage distribution of total no. of boys in six different Schools.
Total Boys in all schools together = 6400

What is the average of total no. of boys in school A, C and F?

B starts 4 minutes after A from the same point, for a place at a distance of 7 miles from the starting point. A on reaching the destination turns back and walks a mile where he meets B. If A's speed is a mile in 8 minutes then B's speed is a mile in ____ minutes.

Mohshin has 5 daughters. The average age of these 5 sisters is 28 years. The youngest one is 16 years old. What was the average age of the 4 daughters before the youngest one was born?

The HCF of three numbers 98, 175 and 210 will be:

What will be the compound interest of Rs 160000 payable half yearly at 10% per annum in 2 years?

A dealer sold an article at a loss of 2%. Had he sold it for ₹44 more, he would have gained 20%. Find the cost price of the article.

Each side of an equilateral triangle is 4 cm. What will be its area?