Question

Squares of size 5 cm × 5 cm are cut out from the corners of a rectangular tin of dimensions 60 cm × 40 cm.The remaining portion is folded to make a box.Find the cost of painting the bottom of the box at the rate of rs2 per square cm

Answer 1

first find the area of the square =5x5=25cm
find the area of the rectangle=60x40=2400cm
remain box area=2400-25=2375cm
find the bottom of the box =2375/4=593.75
find the cost=593.75x2=1187.5per squre cm