Question

the running track is enclosed between two concentric circles of radii 42m and 49 M find the cost of cementing the track at the rate of 25 per metre square

Answer 1

Answer:

Rs 50050

Step-by-step explanation:

Find the area with radius 42 m:

Area = πr²

Area = π(42)² = 5544 m²

Find the area with radius 49 m:

Area = πr²

Area = π(49)² = 7546 m²

Find the area of the track:

Area = 7546 - 5544 = 2002 m²

Find the cost:

1 m² = Rs 25

2002 m² = 25 x 2002 = Rs 50050

Answer:  Rs 50050

Answer 2

Area =2002m

The cost of cementing track=Rs. 50,050