A father gives 8% of his monthly income to both his sons as pocket money. The elder son gets 85% of the total amount given to both sons. He spends 90% of the amount and saves Rs. 17. What is the monthly income of his father?

Study the given bar-chart and answer the question that follows.

The bar-chart shows the production of maize by a state (in 1000 tonnes) over the years.

What was the percentage increase in the production of maize in 2019 compared to that in 2017?

If the side of a cubical box is 12 cm, then find its total surface area.

If b = 5, determine the value of an expression $({5 \over b} + 5b)$ $({25 \over b^2} - 25 + 25b^2)$ using an identity.