If the area of a circle decreases by 36%, then the radius of a circle decreases by

If the area of an equilateral triangle is 24√3 sq. cm, then its perimeter is

Cost of painting the 4 walls of a room 40ft.*15ft. At Rs.5 per square feet is Rs.7500. Find the height of the room?

Find the co-ordinates of the foot of the perpendicular from point (5,7) on the line whose equation is:

x + 7y - 10 = 0.

What is the largest number of pipes of the shape of right circular cylinders with length10 cm and radius 1 cm that can be fitted into a box, all of whose sides are 20 cm in length?

How many plants will be there in a circular bed whose outer edge measure 30 cms, allowing 4 cm² for each plant ?

A flagstaff 17.5 m high casts a shadow of length 40.25m. The height of the building which casts a shadow of length 28.75 under similar conditions will be:

What is the slope of the line given by the equation 4g - 5 = 7 - 2e?

A rectangular plot 15 m x10 m, has a path of grass outside it. If the area of grassy pathway is 54 m², find the width of the path.

P ( - 4, b ) and Q ( 2, b + 2 ) are 2 points and the co-ordinates of the middle point of PQ are ( - 2, 2) . The value of b is