Question

The diameter of cycle wheel is 14 cm. If revolution it will make in moving 15.4 km is 5000 n. Then find n?

Answer 1

Answer:

7

Step-by-step explanation:

Since diameter of wheel is 14 cm then radius is (14/2) cm = 7 cm(r) hence circumference is given by 2πr = (2 × 22/7 × 7) cm = 44 cm. So, total number of rotations is given by 15.4 km(15.4 ×100000 cm = 1540000 cm) divided by 44 cm i.e.

(1540000/44) rotations = 35000 rotations

But, According to question,

5000n = 35000

Therefore, n = 7....