Question

The floor of a rectangular hall has a perimeter 250 m. If the cost of panting the four walls at the rate of Rs.10 per m^2 is Rs.15000, find the height of the hall. [Hint: Area of the four walls = Lateral surface area.]


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Answer 1

Question:-

• The floor of a rectangular hall has a perimeter 250 m. If the cost of panting the four walls at the rate of Rs.10 per m^2 is Rs.15000, find the height of the hall. [Hint: Area of the four walls = Lateral surface area.]

Solution:-

Perimeter of rectangular hall = 2(l + b) = 250 m.

Total cost of painting = Rs.15000

Rate per m2 = Rs.10

Area of four walls = 2(l + b) h m2 = (250×h) m2

A/q,

(250×h)×10 = Rs.15000

⇒ 2500×h = Rs.15000

⇒ h = 15000/2500 m

⇒ h = 6 m

• Therefore the height of the hall is 6m.

Answer 2

Answer:

erosion is the action of surface processes that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location. Erosion is distinct from weathering which involves no movement.