A car travels at a speed of 50 km/h for 3 hours. For the next 2 hours, it travels at a speed of 100 km/h. Find its average speed.

70 km/h

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

80 km/h

No worries! We‘ve got your back. Try BYJU‘S free classes today!

60 km/h

No worries! We‘ve got your back. Try BYJU‘S free classes today!

50 km/h

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A
70 km/h

Distance travelled by car at 50 km/h speed = 50 $\times$ 3 ( $∵$ Distance = speed $\times$ time)

= 150 km

Distance travelled by car at 100 km/h speed = 100 $\times$ 2 ( $∵$ Distance = speed $\times$ time)

= 200 km

Total distance travelled by car = 150 km + 200 km

= 350 km

Total time taken = 3 h + 2 h

= 5 h

$∵$ $A v e r a g e s p e e d$ = $\frac{Total distance}{Total time taken}$

$\Rightarrow$ Average speed of the car = $\frac{350}{5}$

= 70 km/h

Suggest Corrections

Similar questions

Two towns A and B are 100 km apart on a highway. One car starts from A and another from B at the same time. If the cars travel in the same direction, they meet in 5 hours. If they travel towards each other, they meet in 1 hour. Find the speeds of both the cars.

By travelling at a speed of $48 k m / h$ , a car can finish a certain journey in $10$ hours. To cover the same distance in $8$ hours, the speed of the car should be

Question 6

By travelling at a speed of 48 km/h, a car can finish a certain journey in 10 hours. To cover the same distance in 8 hours, the speed of the car should be
(a) 60 km/h
(b) 80 km/h
(c) 30 km/h
(d) 40 km/h

On a weekend, Himanshu went out for a long drive. From 10:00 PM to 11:00 PM he drove at 40 km/h and the next one hour at 50 km/h. Calculate the average speed.

Q. The distance between Delhi and Agra is 200 km. A train travels the first 100 km at a speed of 50 km/h. How fast must the train travel the next 100 km, so as to average 70 km/h for the whole journey?

Join BYJU'S Learning Program