Direct and Inverse Proportions Test

Result

Direct and Inverse Proportions Test - 7

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Question 1
1 / -0

.. 8 men can do a piece of work in 10 days. How long will 10 men take?

Number of Men 8 10

Number of days 10 x

A
12 days

B
8 days

C
7 days

D
6 days

Solution

Let the number of days = x We form the table as shown.

It is a case of inverse proportion. 8 × 10 = 10 × x ⇒ x = 8

days.
Question 2
1 / -0

In a birthday party, on an average, 5 bottles of coke are served for a group of 6 children. How many friends were present at Mohit's party if 15 bottles of cake were used?

Bottles 5 15

No. of children 6 ?

A
18

B
24

C
30

D
12

Solution

Number of children 15×6 / 5 = 18
Question 3
1 / -0

In a camp there is sufficient food for 105 soldiers for 21 days. If 42 soldiers leave the camp, how long would the food last?

Soldiers 105 105-42=63

Days 21 y

A
40

B
30

C
50

D
20

Solution

Cost of one cycle = Rs. 525 ∴ Cost of 52 cycles =Rs. 525 × 52 = Rs. 27300 New cost of one cycle

=Rs. (525+21)=Rs. 546 So, number of cycles bought with Rs. 27300 =27300/546=50
Question 4
1 / -0

A shopkeeper has just enough money to buy 52 cycles worth Rs. 525 each. If each cycle were to cost Rs. 21 more, then number of cycles, he will be able to buy with that amount of money, is _____.

A
40

B
30

C
50

D
20

Solution

Cost of one cycle = Rs. 525 ∴ Cost of 52 cycles =Rs. 525 × 52=Rs. 27300 New cost of one cycle =Rs. (525+21)=Rs. 546 So, number of cycles bought with Rs. 27300 =27300/546 = 50