Question

A car covers a distance of two km in 2.5 minute, if it covers half of the distance with speed 40 km/hr, the rest of the distance it will cover with what speed

Answer 1

Time for 2km =2.5/60HR
For 2km speed= 2/2.5/60=120/2.5 kmph
For first 1km
speed=40kmph
Time=1/40HR
For second 1km
Time=2.5/60-1/40=1/60HR
Speed=1/1/60=60kmph

Answer 2

Answer:

60 km/hr speed.

Step-by-step explanation:

Given :A car covers a distance of two km in 2.5 minute

To Find: If it covers half of the distance with speed 40 km/hr, the rest of the distance it will cover with what speed

Solution:

Total distance = 2 km

It covers half of the distance with speed 40 km/hr

This means it covers 1 km in 40 km/hr

Time  = $\frac{distance}{speed}$

Time  = $\frac{1}{40}$  hours

Time  = $\frac{1}{40} \times 60$  minutes

Time  = $1.5$  minutes

Total time = 2.5 minutes

Time taken in covering half distance = 1.5

Time taken in covering remaining distance = 2.5 - 1.5 = 1 minute = $\frac{1}{60} hour$

Speed for second half = $\frac{1}{\frac{1}{60}}$

                                   = 60 km/hr

Hence the rest of the distance it will cover with 60 km/hr speed.