Question

A car travels at a speed of30 km per hr for 30 min and then at a speed of 45 km per hr. What is the total distance by the car in 2hrs
A) 51.9km
B) 60.8km
C) 82. 5km
D) 97.4km

Answer 1

82.5 km is the answer for the given question

Answer 2

Here is your answer
Speed = 30 km/ hr
Time = 30 minutes
= 30/60 hr
= 1/2 hr
so Distance = Speed× Time
$= 30 \times \frac{1}{2} \\ = 15 \: km$
Now
Speed = 45 km/ hr
Time = 2 hr - 1/2 hr
= 3/2 hrs
so
Distance = Speed × Time
$= 45 \times \frac{3}{2} \\ = 67.5 \: km$
Therefore Car travel in 2 hrs is
= 15 + 67.5
= 82.5 km

Hence Option (C) 82.5 km is your answer

Hope it helps you