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A certain distance is covered at a certa...

A certain distance is covered at a certain speed . If half of this distance is covered in double the time, the ratio of the two speeds is

A

`1:2`

B

`4:1`

C

`1:4`

D

`2:1`

Text Solution

Verified by Experts

The correct Answer is:
B
मानाकि d दूरी t समय में कय करता है
`therefore" चाल"_(1)=(d)/(t)`
d की आधी दूरी `=(d)/(2)`, दोगुना समय = 2t
`therefore" चाल"_(2)=(d)/(2xx2t)=(d)/(4t)`
`therefore("चाल"_(1))/("चाल"_(2))=(d)/(t)xx(4t)/(d)=(4)/(1)`
अभीष्ट अनुपात `=4:1`
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