Raji planned to stitch a cover for his 2 speaker boxes whose length ,breadth,height are 35,30,55.find the cost of cloth he has to buy if it costs 75rupees per sq.m
Answers
Answer:
123
Step-by-step explanation:
surface area of both covers = 2×(CSA +1base)
=2×{2(l+b)h+ lb}
=2×{2(35+30)55+35×30}
=2×{130×55+1050}
=2×(7150+1050)
=2*8200
=16400 sqcm
=1.64 sqm
cost of cloth = 1.64×75= ₹24.60
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Answer:
Rs. 123
Step-by-step explanation:
Since raju wants planned to stitch a cover for his two speaker boxes
He need to cover the lateral surface area of speaker and one base
length = 35 cm
breadth = 30 cm
height = 55 cm
Since speaker is in the shape of cuboid :
Lateral surface area of cuboid + one base =
l = length= 35 cm
b = breadth = 30 cm
h = height = 55 cm
So, area of cloth used to stitch the cover of speakers =
=
=
Since there are 2 speakers so, area of cloth required fro 2 speakers :
Now, 1 sq.cm. = 0.0001 sq.m.
So, 16400 sq.cm. = 0.0001 *16400 = 1.64 sq.m.
Since cost of 1 sq.m. = 75
So, cost of 1.64 sq.m.=75*1.64 = 123
Hence the cost of the cloth he has to buy is Rs.123