Surface area of a sphere is 616 sq.cm. Which of the following is an incorrect alternative related to the sphere with double the radius of that sphere?

Side of the adjoining square MNOP is 18 cm. Points ‘X’ and ‘Y’ are the midpoints of the sides MP and NO respectively. Find the area of the shaded region.

A square shaped compound of a temple has side 40 m. On each side of the compound, triangular gardens of side equal to that of the side of the compound are there. What will be the total cost of 5 rounds of wire fencing for protection from their outer edges only, for all the gardens, at the rate of Rs. 80 per m of wire?

Area of the square hall with height 4 m. is 49 sq.m. What will be the total cost (in rupees) of colouring all the walls of that hall at the rate of Rs. 300 per sq.m.?

The conical tent with height 21 m. has base circumference 176 m. How much air (in cubic m.) can be contained in that tent?