Question

easy way to byheart formulas of surface area and volume ​

Answer 1

Understand the given figure and draw the figure on a paper

Apply the given formula as per your convenient

Recall it frequently (daily)

Maths is always based on understanding so try to understand the concept.

Hope this helps you

Answer 2

Answer:

3x+ 7y =26and 4x +5y =13

3x+7y = 26 +_4x+5y =13

7x+12y =39