A student has to review a subject before his exams. If the number of topics covered is directly proportional to numbers of hours taken and If he covers 9 topics in a single 45-minute period, how many topics can he cover in a 1-hour period?

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

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

Open in App

Solution

The correct option is C 12
We know that $45 m i n = \frac{3}{4} h o u r$ .
Now $\frac{3}{4} h o u r \to 9 t o p i c s$
Therefor $1 h o u r \to \frac{9 \times 4}{3} t o p i c s$
$= 12 t o p i c s$ .

Suggest Corrections

Similar questions

Q. A man covers 5 km in an hour. How many kilometres can he cover in 4 hours?

Rajat rides a bike covering 14 km in 35 minutes. If the speed remain same,how much distance can he cover if he travels for 5 hours?

Q. Alvaro takes 1 hour to cover a distance of 3 km while riding a bicycle. If he rides at the same speed, in how many hours will he cover a distance of 21 km?

Q. Ravi drives at a speed of 20 km per hour. If he triples his speed, how many kilometres can he cover in 5 hours?

In how many of these years, the aggregate number of marks allotted to all the topics is less than the aggregate number of marks allotted to all the topics in the year 1999 but more than aggregate number of marks allotted to all the topics in the year 2001?

Join BYJU'S Learning Program

A student has to review a subject before his exams. If the number of topics covered is directly proportional to numbers of hours taken and If he covers 9 topics in a single 45-minute period, how many topics can he cover in a 1-hour period?

The correct option is C 12We know that 45min=34hour.Now 34hour→9topicsTherefor 1hour→9×43topics=12topics.

The correct option is C 12
We know that $45 m i n = \frac{3}{4} h o u r$ .
Now $\frac{3}{4} h o u r \to 9 t o p i c s$
Therefor $1 h o u r \to \frac{9 \times 4}{3} t o p i c s$
$= 12 t o p i c s$ .