A car is moving along a straight road with a uniform acceleration. It passes through two points P and Q separated by a distance with velocity `30km//h` and `40 km//h` respectively. The velocity of the car midway between P and Q is

Options

A. `33.3 km//hr`
B. `20 sqrt3 km//hr`
C. `25 sqrt2 km//hr`
D. `35 km//hr`

Answer

C

Explanation

`(40)^(2) = (30)^(2) + 2as`
`350 = as`
Now, `v_(m)^(2) = (30)^(2) + as`