A car travels 90 km in 2 1/2 hours
(a) How much time is required to cover in 30 km with the same speed
(b) Find the distance covered in 2 hours with the same speed
Answers
Answer:
Distance traveled by the car = 90 km
Time taken by the car =hours = 2 hours + 30 minutes = 120 minutes + 30 minutes = 150 minutes
Speed of the car
=Distance travelled/Time taken
=90/150=3/5Km/min
Time taken by the car to travel 30 km
= Distance/speed
=30/(3/5)
=30×5/3
=50 minutes
Given: distance= 90km
time taken= 2hr 30 min = 2.5 hours or 150 min
Find: (a) Time required to cover in 30 km
(b) Distance covered in 2 hours
Firstly we will find the speed of the car i.e.,
Speed = Distance covered
Time taken
Speed = 90 km
2.5 hr
Speed = 36 km/hr or 10meter/sec
(a) Time required for 30 km
= Distance covered
speed
= 30 km
36 km/hr
= 0.83 hr or 50 min
Hence, the time required to cover 30km = 50 min or 0.83 hours.
(b) Distance covered in 2 hours
= speed × time
= 36 km/hr × 2 hr
= 72 km
Hence distance covered in 2 hours is 72 km