If a = 7/8 and b = 9/12,then evaluate a+b , a-b , a×b and a÷b

Given, a = 7/8, b = 9/12

a+b = 7/8 + 9/12 = (21+18)/24 = 39/24 = 13/8

a-b = 7/8 + 9/12 = (21-18)/24 = 3/24 = 1/8

a×b = 7/8 × 9/12 = 7/8 × 3/4 = 21/32

a÷b = 7/8 ÷ 9/12 = 7/8 × 12/9 = 7/8 × 4/3=7/6

Hence 27 cubes can be obtained.

Step-by-step explanation:

Volume occupied by one cube of side 2cm = 2*2*2 = 8cm^3

Volume of cube of side 6cm = 216cm^3

Number of cubes of side 2cm which would fit in a cube of side 6cm = 216/8 = 27 cubes