Some more help on 8th grade math

The basics of algebra, geometry problems are based on rational numbers and finding volume and surface volume problems comes under the 8th grade math and some of these problems are solved to help you. Look Below.

This is the continuous of my previous post which gave you some solved 8th grade math problems look at it before we start.

Question No.1

Find the surface area of a cuboid given l = 15 cm, h = 11 cm and w = 13 cm

Solution :

Surface Area of cuboid = 2(lw + wh + hl)

= 2 ( (15x13) + (13x11) + (11x15) )

= 2(195 + 143 + 165)

= 2(503)

= 1006 cm2

Question No.2

Find the height of the square pyramid if the volume is 72 cm3 and the base of side is 6 cm.

Solution

Volume of square pyramid = 1/3 Ah

= 1/3 a2 h (Area of square = a2)

Height of pyramid h = (3 * V) / a2

= (3*72) / 62

= 6 cm

Next i will come up with more and more but this time its going to be 9th grade math help. Work on some more problems by using your own numbers and give me your feedback on this.