How much longer does it take to travel 100 kilometers at 65 km/h than at 70 km/h?

6 minutes and 35 seconds

Step-by-step explanation:

65 km/h will take you 01:32:18 to travel 100 kilometers

70 km/h will take you 01:25:43 to travel 100 kilometers

subract 01:25:43 from 01:32:18 and you have 6 minutes and 35 seconds

answer: the answer is (b) amie should have multiplied

step-by-step explanation: given a sphere and a cylinder with same radius and height.

let, 'r' be the radius of the cylinder and sphere and 'h' be the height of the cylinder. according to the question,

r = h.

now, the volume of the sphere will be

and the volume of the cylinder will be

therefore, we have

thus, ammie should have multiplied the volume of the sphere