Question

18 complete turns of a screwdriver can just drive a screw 9/2 CM plank. How many turns will be required to drive the screw through 9 CM plank

Answer 1

Answer:

36

Step-by-step explanation:

9/2cm=4.5 cm

so for 1 cm complete turns required are 18÷4.5=4

so for 9cm

=9*4=36.

also as 9/2(4.5) is the half of 9 so double the amount of turns would be required to drive a screw in a plank which =18*2=36