How to calculate square root 1.4 without calculator

Approximate only

Step-by-step explanation:

the perfect square smaller than 1.4 is 1, because

Take the difference between the two, 1.4 -1 = 0.4

Put the whole with 1. the part will be as follow:

Note: just approximate!! with calculator, it is 1.18321

0.6

39mph

step-by-step explanation:

the given 6 = w/p is equivalent to 6p = w, where w is the total area of the walls and p is the area covered by a single can of paint.

knowing that 6 cans of paint will be needed, 6p = w becomes 6(6) = w = 36.   this tells us that the total area to be painted is 36 square units.