Question

A rectangular field is 45m long. Its breadth is 15m less than its length. Find the cost of (a) levelling it at the rate of Rs.5 per square metre, and (b) fencing at the rate of Rs. 7 per metre. ​

Answer 1

Given: Length of the rectangular field=110 m

Breadth of the rectangular field=85 m

Perimeter of the rectangular field=2(l+b)

=2(110+85)=2×195

Perimeter of the rectangular field=390 m

2

Cost to fence the field per metre=Rs.25

Cost to fence the field 390 metre=Rs.25×390=Rs.9,750‬

Answer 2

Answer:

−3+3x=−2(x+1)

- 3 + 3x = ( - 2x + - 2)−3+3x=(−2x+−2)

3x + 2x = - 2 + 33x+2x=−2+3

5x = 55x=5

x = \frac{5}{5}x=

5

5