b) Rakesh bought an article for ₹1400 and sold it for ₹1190. Calculate his profit% or loss % [3]
c) The sides of a triangle are 21cm, 17cm and 10cm.Find its area.
Answers
b) Rakesh bought an article for ₹1400 and sold it for ₹1190. Calculate his profit% or loss %.
Given :
- Cost Price = Rs. 1400
- Selling Price = Rs. 1190
To find :
- profit% or loss %
Solution :
Since,
C.P > S.P [Here, it is loss]
Loss = S.P - C.P
= 1400 - 1190
= 210
= 15 %
Therefore, loss% is 15%.
c) The sides of a triangle are 21cm, 17cm, and 10cm. Find its area.
Given :
- Sides = 21cm, 17cm and 10cm
To find :
- Area
Solution :
Semi Perimeter =
=
=
= 24 cm
Area using Heron's Formula =
=
=
=
= 84 cm²
Therefore, the Area of the Triangle is 84 cm².