Question

Gupta and Sharma both drive to their new home 600 km away. Gupta drives the family car at an
average speed of 65 km/hr. Sharma drives their office truck at an average speed of 50 km/hr. During
the trip Gupta stops for a total time of 2 hours and 20 minutes and Sharma stops for 90 minutes. What
is the approx. difference in minutes of their arrival times?
(A) 91
(B) 131
(C) 129
D) 116​​

Answer 1

Answer:

Gupta and Sharma both drive to their new home 600 km away. Gupta drives the family car at an

average speed of 65 km/hr. Sharma drives their office truck at an average speed of 50 km/hr. During

the trip Gupta stops for a total time of 2 hours and 20 minutes and Sharma stops for 90 minutes. What

is the approx. difference in minutes of their arrival times?

116

Answer 2

Given: Given that Gupta and Sharma both drive to their new home 600 km away. Gupta drives the family car at an average speed of 65 km/hr. Sharma drives their office truck at an average speed of 50 km/hr. During

the trip Gupta stops for a total time of 2 hours and 20 minutes and Sharma stops for 90 minutes.

To find: We have to find out the approx. difference in minutes of their arrival times.

Solution:

We know that,

Distance=speed×time

Gupta drives the family car at an average speed of 65 km/hr.

The time of travelling=

$\frac{600}{65}$

=9 hour 15 minutes.

During the trip Gupta stops for a total time of 2 hours and 20 minutes

So total time=(9hr 15min+2hr 20min)

=11hr 35min

=695min

Sharma drives their office truck at an average speed of 50 km/hr. During

the trip Sharma stops for 90 minutes.

So total time of travelling

$= \frac{600}{50} + 90min$

=12 hour 90 min

=810min

The difference in minutes of their arrival times is

(810-695) =115minute.

So, the correct option is D) 116.