Question

Kanika had a piece of cloth 1 m long and 60 cm broad. She cut it into square shaped handkerchiefs, each side measuring 20 cm and put a lace on the boundary. How much lace is needed for the handkerchiefs?

Answer 1

Step-by-step explanation:

1 m=100 cm

so

area of the piece of cloth=lxb =100x60=6000cm^2

area of each square hand kerchiefs =a^2=20x20=400cm^2

no. of square hand kerchiefs=area of rectangle/square=6000/400=15 handkerchiefs

perimeter of square=4a=4x20=80cm

perimeter of square= boundary of square hand kerchiefs

amount of lace needed=perimeter x no. of kerchiefs=80x15=1200cm