Question

find the volume of the cube whose surface is 96cm^2

Answer 1

10th to 99th, any table,
very easy method to learn.
I didn't know this. Because it was not taught to us in school.

How to write Table of any two digit number?

F*or example Table of *87*

First write down *table of 8 then write down table of 7 beside it*

8 7 87
16 14 (16+1) 174
24 21 (24+2) 261
32 28 (32+2) 348
40 35 (40+3) 435
48 42 (48+4) 522
56 49 (56+4) 609
64 56 (64+5) 696
72 63 (72+6) 783
80 70 (80+7) 870

Now table of 38

3 8 38
6 16 (6+1) 76
9 24 (9+2) 114
12 32 (12+3) 152
15 40 (15+4) 190
18 48 (18+4) 228
21 56 (21+5) 266
24 64 (24+6) 304
27 72 (27+7) 342
30 80 (30+8) 380
33 88 (33+8) 418
36 96 (36+9) 456

Now table of 92

9 2 92
18 4 184
27 6 276
36 8 368
45 10 (45+1)460
54 12 (54+1)552
63 14 (63+1)644
72 16 (72+1)736
81 18 (81+1)828
90 20 (90+2)920
99 22 (99+1)1012
108 24 (108+2)1104

This way one can make Tables from10 to 99

Share & teach children

This is Vedic Mathematics!!..

Answer 2

$\mathsf{\huge{Answer}}$

$\bold{Given\:that,}$

Surface area of a cube = $96cm^2$

$\bold{To\:find,}$

Volume of the cube = ?

$\bold{We\:know\:that,}$

The surface area of a cube = $6a^2$

$\bold{[By\:equating,]}$

$6a^2 = 96cm^2$

Here, we have to find the value of 'a'.

So, $6a^2 = 96cm^2$

$a^2 = \frac{96cm^2}{6cm}$

$a^2 = 16cm$

$a = \sqrt{16cm}$

a = 4 cm

$\bold{Therefore\:a\:is\:equal\:to\:4cm.}$

$\bold{We\:know\:that,}$

Volume of a cube = $a^3$

$\bold{[By\:substituting\:the\:value\:of\:a,]}$

Therefore, the volume of the cube = $(4cm) ^3$

Therefore, the volume of the cube = $64cm^3$