Question

The cost of polishing a triangular table top at 280 per m² is 448. Find the altitude of the table top if the base is 400 cm.

proper solution​

Answer 1

Answer:

Step-by-step explanation:

The altitude of the tabletop is 0.8 m.

Step-by-step explanation:

The cost of polishing a triangular tabletop is Rs. 448  at the rate of Rs. 280 per square meter.

Therefore, the area of the triangular tabletop is \frac{448}{280} = 1.6 square meters.

Now, if the base of the triangular top is 400 cm i.e. 4 meters and height of this is h m. then we can write

\frac{1}{2} \times 4 \times h = 1.6

⇒ h = 0.8 m

Therefore, the altitude of the tabletop is 0.8 m. (Answer)

or

area of triangle =448/280

altitude =400cm=4m=h

1/2×4×h=448/280

altidude=0.8m=80cm