# The rate of planting the grass is ₹x per square metre. Find the cost of planting the grass on a triangular lawn whose base is y metres and height is z metres

**Solution:**

Given, the rate of planting grass is ₹x per square metre.

We have to find the cost of planting the grass on a triangular lawn with base y metres and height z metres.

Area of triangle = 1/2 × base × height

Base = y

Height = z

Area of triangular part = 1/2 × y × z

= yz/2 square metres

Cost of planting grass in 1 square metre = ₹x

Cost of planting grass in yz/2 square metres = x × yz/2

= ₹xyz/2

Therefore, the cost of planting grass is ₹xyz/2

**✦ Try This:** The rate of planting the grass is ₹x per square metre. Find the cost of planting the grass on a triangular lawn whose base is 2m metres and height is 3z metres

**☛ Also Check:** NCERT Solutions for Class 7 Maths Chapter 12

**NCERT Exemplar Class 7 Maths Chapter 10 Problem 80**

## The rate of planting the grass is ₹x per square metre. Find the cost of planting the grass on a triangular lawn whose base is y metres and height is z metres

**Summary:**

The rate of planting the grass is ₹x per square metre. The cost of planting the grass on a triangular lawn whose base is y metres and height is z metres is ₹xyz/2

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