Question

shalini has to cut out of diameter 1 1/4 cm from an aluminium strip of dimensions 8 3/4 cm by1 1/4 cm. how many full circles can shalini cut? also calculate the wastage of the aluminium strip.

Answer 1

area of rect. strip=l×b
= 83/4×11/4
=57.06cm^2

area of 1 circle = 22/7 × r^2
=5.9cm^2

circles = area of strip / area of circle
=9.5 circles