Question

Two persons 'A' and 'B' walk round a circle whose 0diameter is 1.4 km. A walks at a speed of 100 meters per minute while B walks at a speed of 110 meters per minute. If they both start at the same time, from the same point and walk in the same direction, at what interval of time would they both be at the same starting point again?​ Please check the digits carefully as in books, digits are different.​

Answer 1

Answer:

diameter of the circle=1.4cm

Step-by-step explanation:

circumference=2pi r=2 x 22/7 x 1.4km/2=4.4km a's speed=100m/s thus time taken a to travel  4.4km[4,400m]=4400/100min=44mins b's speed=110m/s thustime taken by b to travel 4.4km[4,400m]=4400/110mins=40mins                   required interval of time=lcm of [44,40]=lcm of[44,40]/hcf[1,1]=44/1 min = 44/60hrs=0.73hrs