Rudra Sharma
Board preparation ke liye formulas, identities and results ek jagah mil gaye. Daily problem-solving ka flow better ho gaya.
Maths Formula SheetShort videos that walk you through the real book, page by page.
Left: the same topic as it reads in a regular textbook. Right: the real page from this book.

A large number of objects used in everyday life are not single solids at all but are built up by joining two or more of the familiar shapes studied in earlier classes – the cuboid, the cylinder, the cone and the sphere. A circus tent, for instance, is usually a cylinder with a cone resting on it; a child's top may be a cone attached to a hemisphere; and a medicine capsule is a cylinder closed at both ends by hemispheres. When the surface area of such an object is required, it is not correct to add up the total surface areas of the separate solids, since the portion of each surface lying along the joint is no longer exposed.
Consider the tent described above. Only the slanting curved surface of the conical top, the curved surface of the cylindrical part and the circular floor can be seen from outside, so the required area is obtained by adding exactly these three quantities.
The volume behaves differently: when two solids are joined, no space is lost, so the volume of the combined solid is simply the total of the volumes of its parts.
Swipe through real pages from this book. Tap any page to read it.
Unit-wise marks as per the CBSE 2026-27 theory paper.
Algebra, Geometry and Trigonometry together carry 47 of 80 marks — master their formulas first.
Repeat the cycle 3–4 times before boards. Most students finish the textbook once.
real students, real feedback
What students and parents say about this book and its combinations
Board preparation ke liye formulas, identities and results ek jagah mil gaye. Daily problem-solving ka flow better ho gaya.
Maths Formula SheetPre-board revision ke liye both books very useful rahe. Formulas aur theory quickly cover ho jaate hain.
Maths + Science ComboThe complete set helped me create a proper board revision schedule. Teen subjects ka material ek format mein milta hai.
Maths + Science + SST ComboA printed book, packed and delivered to your address.
Yes, the 2026-27 edition, written from the current NCERT textbook.
Usually 5 to 7 business days; remote areas up to 10. You get a tracking link on WhatsApp.
Send photos within 48 hours of delivery and we replace it free.
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