An open box is painted at the cost of rupees 50 per metre square the.Dimension of the box are 50 cm by 20 CM by 10 cm find the cost of painting.
Answers
there is solution and the answer is rupees 12
Step-by-step explanation:
the total surface area of the box = 2(lb+bh+hl)
=2(50x20+20x10+10x50)
= 2(1000+200+500)
= 2(1700)
= 3400 m²
as the box is kept open = 3400 - lxb
= 3400 - 1000
= 2400 m²
Area that should be painted = 2(2400)
(because we should paint it inside and outside the box)
= 4800 m²
cost of painting = 4800 x 50/10000
= Rs.24
if only outside,
= 2400x50/10000
= Rs. 12