Book Online Demo

Check Your IQ

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

Two cars left place A simultaneously and reached the place B in 2 hrs. The first car travelled half the distance with a speed of $30 km/hr$ and the other half at a speed of $45 km/hr$ . The second car at the same time covered the entire distance with a constant acceleration starting from rest. Find the acceleration of the second car.

see full answer

High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET

🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.

An Intiative by Sri Chaitanya

36 {km/hr}^{2}

144 {km/hr}^{2}

72 {km/hr}^{2}

18 {km/hr}^{2}

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

for both cars time is same

For car A :

$t = 2 hrs$

$v_{avg} = \frac{{2v}_{1} v_{2}}{v_{1} + v_{2}}$

$v_{1} = 30 kmph$

$v_{2} = 45 kmph$

$= \frac{2 \times 30 \times 45}{30 + 45}$

$= \frac{90 \times 30}{75}$

$= \frac{9 \times 100}{25} = 36 kmph$

$s = v_{a v g} \times t = 36 \times 2 = 72 km$

For car B :

$u = 0,s = 72 km, t = 2hr, a = ?$

$s = u + \frac{1}{2} {at}^{2}$

$72 = (0) (2) + \frac{1}{2} (a) {(2)}^{2}$

$72 = 0 + 2 a$

$\Rightarrow 2a = 72$

$\Rightarrow a = 36 {km/hr}^{2}$

Watch 3-min video & get full concept clarity

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE