Question

3. The edge of a triangular board are 6cm, 8cm,and 10cm. The cost of
painting it at the rate of 70paise per square cm is
O Rs. 7
O Rs. 6
O Rs. 17.30
O Rs. 16.80​

Answer 1

Answer:

first use the herons formula to get the area of board and then multiply it by 70/100

Answer 2

Answer:

16.80 rupees

Step-by-step explanation:

first we have to find the perimeter for triangle

formulae of perimeter =a+b+c

6cm+8cm+10cm=24sqcm

cost for per sqcm=70paise

then 24 multiplied by 70 paise=16.80