Question

*How much does it cost to paint a cuboidal wooden box of 2 m length, 1 m width and 1 m height at the rate of Rs 40 per sqm.?*

1️⃣ Rs 400
2️⃣ Rs 800
3️⃣ Rs 240
4️⃣ Rs 480​

Answer 1

Answer:

surface area of cuboid=2(lb+bh+hl)

Step-by-step explanation:

2(2×1+1×1+2×1)=10 m²

now,

total cost of painting =10×40= ₹400

Answer 2

Given : cuboidal wooden box of 2 m length, 1 m width and 1 m height

Rate of paint Rs 40 per sq m

To Find : cost of paint

1️⃣ Rs 400

2️⃣ Rs 800

3️⃣ Rs 240

4️⃣ Rs 480​

Solution:

Total surface area of cuboid

= 2 (lb + bh + lh)

l = 2

b = 1

h = 1

= 2 ( 2 * 1 + 1 * 1  + 2 * 1 )

= 2 ( 2 + 1 + 2)

= 2 ( 5)

= 10  m²

Rate of paint Rs 40 per sq m

Cost of paint = 40 x 10   = Rs 400

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