find the cost of painting the all round outer surface of a box with lid 60cm 40cm wide and 30cm high at 50 p per 20 cm
Answers
Answered by
9
2(lb+bh+hl)=.tsa of box
l=60cm
b=40cm
h=30cm
A.T.Q,
2(lb+bh+hl)= tsa
TSA= 2( 60x40+40x30+30x60)
= 2(2400+1200+1800)
=2(5400)
= 10800cm²
cost of 20cm= 50Rs.
cost of 1cm = 50/20
=2.5p
cost of 10800cm²=2.5x10800
=27000p
1Rs=100p
27000p= 2700Rs.
MARK IT AS BRAINLEAST
l=60cm
b=40cm
h=30cm
A.T.Q,
2(lb+bh+hl)= tsa
TSA= 2( 60x40+40x30+30x60)
= 2(2400+1200+1800)
=2(5400)
= 10800cm²
cost of 20cm= 50Rs.
cost of 1cm = 50/20
=2.5p
cost of 10800cm²=2.5x10800
=27000p
1Rs=100p
27000p= 2700Rs.
MARK IT AS BRAINLEAST
nicky9936:
but ans is 270 only
Answered by
6
heya,
here's the answer
Total surface area= 2(lb+bh+lh)
=2(2400+1200+1800)
=2(5400)
=10800cm^2
cost of painting 20cm= 50p
,, ,, ,, ,, 10800cm^2 = 50/20(10800)
= 27000 paise or 270 rupees
hence,mark as brainly...
here's the answer
Total surface area= 2(lb+bh+lh)
=2(2400+1200+1800)
=2(5400)
=10800cm^2
cost of painting 20cm= 50p
,, ,, ,, ,, 10800cm^2 = 50/20(10800)
= 27000 paise or 270 rupees
hence,mark as brainly...
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