How to calculate the volume of a sphere ? class 9th maths.

-s.shinde

class 9th

find the area between the curves y^2=4a(a+x) andy^2=4b(x-b)

I am an architect and i want to make different vouchers for my office and how to create bill for various services. Which i provide like interior work, elevation and  planning,etc.

If triangle a couple similar to rpq ab=3cm bc=5cm ac=6cm rp=6cm and pq=10cm then find qr

suresh has a field in a triangular form, whose sides are 21 meters,29 meters, and 30 meters.he wants to donate 1/4 area of his field to blind school.suggest him how to cut his field so that he can give accurate area to blind school.also prove it.what values are depicted by Suresh? (congruent figures have equal areas.)

Find the radius of circle 2x²+2y²+4x-3y+2=0