Question

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

Answer 1

area of triangle =448/280
altitude =400cm=4m=h
1/2×4×h=448/280
altidude=0.8m=80cm

Answer 2

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)