Question

solve the maths question

1. FIND THE COST OF PAINTING THE ALL ROUND OUTER SURFACE OF A BOX WITH LID 60 C.M LONG, 40 C.M WIDE, 30 C.M HIGH AT 50 P PER 20 C.M (SQUARE)

Answer 1

area=2lb+2lh+2bh
=2(60*40)+2(60*30)+2(40*30)
=2*2400+2*1800+2*1200
=4800+3600+2400
=10800cm^2
cost of painting=Rs.10800

Answer 2

total surface area=2lb+2lh+2bh
l=60
b=40
h=30
=2(60*40)+2(60*30)+2(40*30)
=2*2400+2*1800+2*1200
=4800+3600+2400
=10800 cm²