Question

.A piece of wire in the form of

abrectangle of 8.9cm long and 54 millimetre broadis reshaped and bentin the form of circle find the radius of circle in millimetre.​

Answer 1

Answer:

Steiven the length of the cardboard sheet is 145cm and breadth is 32cm

hence area of the cardboard=l×b

=145×32

=4640cm²

diameter of one circle which has been cut out from the sheet=8cm

therefore radius=8/2

=4cm

area of one circle=πr²

=22/7×4×4

=352/7cm²

therefore area of 42 such circles=352/7×42

=14784/7

=2112cm²

thus area of the remaining sheet=4640-2112

=2528cm²

hope this helps...!

p-by-step explanation: