Question

A gardener wants to fence a circular garden of diameter 21 m. Find the length of the rope he needs to purchase, if he makes 2 rounds of fence. Also find the costs of the rope, if it cost Rs 4 per meter.[take pi as 22/7]

Answer 1

Answer:

The expression 2x³+ px² + qx – 30

has a factor x+2 and leaves a remainder of –35 when divided by

2x –1. Find the value of p and of q. 

             A) 

P = 14 , q=3

B) 

P= 12 q = 3

C) 

P =5 , q =-13

D) 

P=15 , q =3

Answer 2

Step-by-step explanation:

Diameter of the circular garden=21m

∴ Radius of the circular garden=

2

21

m

Now, circumference of circular garden=2πr=2×

7

22

×

2

21

=22×3=66m

The gardener makes 2 rounds of fence so the total length of the rope of fencing =2×2πr=2×66=132m

Since the cost of 1 meter rope=Rs. 4

Therefore, cost of 132 meter rope=4× 132=Rs. 528