Is there a significant difference between 6'1 and 6 foot? - Quora
Ex 6.1, 1 Class 12 Maths - Find rate of change of area of a circle
A cube of side 4 cm is cut into 1 cm cubes. What is the ratio of the surface areas of the original cubes and cut-out cubes? (a) 1 : 2 (b) 1 : 3 (c) 1 : 4 (d) 1 : 6