CBSE Class 8 Mathematics Direct and Inverse Proportions MCQs

Question. An electric pole, 14metres high, casts a shadow of 10metres. What will be the height of a tree that casts a shadow of 15 metres under similar conditions?
(i) 14 m
(ii) 20 m
(iii) 21 m
(iv) 24 m

Question. A train is running at a speed of 75 km/hr. What distance will it cover in 20 minutes ?
(i) 15km
(ii) 20km
(iii) 23 km
(iv) 25 km

Question. A machine manufactures 840 bottles in six hours. Find the number of bottles it can manufacture in five hours ?
(i) 600
(ii) 650
(iii) 700
(iv) 750

Question. The scale of a map is given as 1:30000000 . If two cities are 4 cm apart on the map , what is the actual distance between them ?
(i) 600 km
(ii) 1400 km
(iii) 1300 km
(iv) 1200 km

Question. If 15 workers can build a wall in 48 hours, how many workers will be required to do the same work in 30 hours ?
(i) 15
(ii) 14
(iii) 24
(iv) 30

Question. A car takes 2 hours to reach a destination by running at a speed of 60 km/hr. How long will it take when the car runs at a speed of 80 km/hr ?
(i) 1.5 Hrs.
(ii) 1.4 Hrs.
(iii) 2.4Hrs.
(iv) 2.5Hrs.

Question. 6 pipes are required to fill a tank in 1 hr 20 minutes. How long will it take if only 5 pipes of the same type are used ?
(i) 2 hr36 minutes.
(ii) 1 hr36 minutes.
(iii) 2 hours.
(iv) 1 hr 30minutes.

Question.  If 5 people can do a piece of work in 20 days, how many people can do the same work in 2 days ?
(i) 8
(ii) 50
(iii) 100
(iv) 200