Class 8 Direct And Inverse Proportions CBSE Questions & Answers

Class 8 · Direct And Inverse Proportions

This is Mathematics Class 8 Direct and Inverse Proportions CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
A car can finish a journey in 10 hours at the speed of 48 km/hr. By how much should its speed be increased so that it may take only 8 hours to cover the same distance?
  • A
    12 km/h
    Correct
  • B
    10 km/h
  • C
    None of these
  • D
    14 km/h
2
Reema types 540 words in half-hour. How many words would she type in 6 minutes?
  • A
    None of these
  • B
    120
  • C
    108
    Correct
  • D
    124
3
If 56 men can do a piece of work in 42 days, how many men are required to complete it in 14 days?
  • A
    145
  • B
    156
  • C
    168
    Correct
  • D
    160
4
The scale of a map is given as 1 : 40000000. Two cities are 4 cm apart on the map. Find the actual distance between them.
  • A
    1600 km
    Correct
  • B
    1200 km
  • C
    None of these
  • D
    1000 km
5
12 pipes are required to fill a tank in 2 hours 40 minutes. How long will it take if only 10 pipes of the same type are used?
  • A
    3 hours 40 minutes
  • B
    2 hours 12 minutes
  • C
    None of these
  • D
    3 hours 12 minutes
    Correct
6
If a box of sweets is divided among 48 children, they will get 7 sweets each. How many would each get, if the number of the children is reduced by 6?
  • A
    2
  • B
    8
    Correct
  • C
    4
  • D
    6
7
A batch of bottles were packed in 25 boxes with 12 bottles in each box. If the same batch is packed using 20 bottles in each box, how many boxes would be filled?
  • A
    27
  • B
    15
    Correct
  • C
    24
  • D
    18
8
A school has 8 periods a day each of 45 minutes duration. How long would each period be, if the school has 9 periods a day, assuming the number of school hours to be same?
  • A
    40 minutes
    Correct
  • B
    32 minutes
  • C
    44 minutes
  • D
    36 minutes
9
120 men had food provision for 195 days. How long would the food last if there are 90 men?
  • A
    None of these
  • B
    240
  • C
    260
    Correct
  • D
    300
10
18 men can reap a field in 35 days. Find the number of men required to reap the same field in 15 days.
  • A
    42
    Correct
  • B
    46
  • C
    40
  • D
    44
11
Working for 8 hours daily, 40 people can dig the foundation of a building in 21 days. Working for 10 hours daily, if the work is to be finished in 14 days, how many people are needed to do the same work?
  • A
    None of these
  • B
    6
  • C
    10
  • D
    8
    Correct
12
6 typists working 5 hours a day can type the manuscript of a book in 16 days. How many days will 4 typists take to do the same job each working 6 hours a day?
  • A
    20
    Correct
  • B
    12
  • C
    24
  • D
    None of these
13
In an army camp, there are 800 soldiers. There is enough food for them for 60 days. If 400 more soldiers arrive at the camp, how many days will the food last?
  • A
    None of these
  • B
    20
  • C
    40
    Correct
  • D
    30
14
A hostel spends Rs. 3200 as cost of rice for 20 students for 30 days. If the hostel spends Rs. 2400 for 30 students, for how many days will the rice last?
  • A
    15
    Correct
  • B
    None of these
  • C
    18
  • D
    21
15
A train can finish a journey in 10 hours, travelling at a speed of 56 km/h. If another faster train is to cover the same journey in 8 hours, what would be the average speed of the new train?
  • A
    70 km/h
    Correct
  • B
    60 km/h
  • C
    50 km/h
  • D
    80 km/h