Practice | Hashtable

61. If 2 m, 60 cm cloths is required for one shirt, then the cloth required for 7 shirts is ?

A. 14 m 80 cm

B. 18 m 20 cm

C. 15 m 20 cm

D. 16 m 80 cm

Discuss

Solution:

Cloth is required for 1 shirt
= 2 m, 60 cm or 260 cm
Cloth is required for 7 shirt
= 260 × 7
= 1820 cm or 18 m 20 cm

62. The cost of 4 dozen papers is Rs. 24. The cost of 1 score of papers (in rupees) is ?

A. 40

B. 20

C. 10

D. 42

Discuss

Solution:

1 score of papers = 20 papers
Cost of 4 dozen papers = Rs.24
Cost of 20 papers

\begin{aligned} = \frac{24}{4 \times 12} \times 20 \\ = Rs .10 \end{aligned}

63. The cost of 8 fans and 14 ovens is Rs. 36520. What is the cost of 12 fans and 21 ovens ?

A. Rs. 56800

B. Rs. 54780

C. Rs. 57950

D. Cannot be determined

Discuss

Solution:

Cost of 8 fan's and 14 oven's is Rs. 36520
Cost of 4 fan's and 7 oven's is Rs.

\frac{36520}{2}

= Rs.18260
Cost of 12 fan's and 21 oven's is
= 18260 × 3
= Rs. 54780

64. The cost of 5 kgs of apples is Rs. 450. The cost of 12 dozen mangoes is Rs. 4320 and the cost of 4 kgs of oranges is Rs. 240. What is the total cost of 8 kg of apples, 8 dozen of mangoes and 8 kg of oranges ?

A. Rs. 4020

B. Rs. 4080

C. Rs. 4050

D. Other than those given as option

Discuss

Solution:

Cost of 5 kgs apples Rs. 450
Cost of 1 kg apples Rs.

\frac{450}{5}

Cost of 8 kgs apples =

\frac{450}{5} \times 8

= Rs.720
Cost of 12 dozens mangoes Rs. 4320
Cost of 1 dozen mangoes Rs.

\frac{4320}{12}

Cost of 8 dozen mangoes =

\frac{4320}{12} \times 8

= Rs. 2880
Cost of 4 kgs oranges = Rs. 240
Cost of 1 kg orange = Rs.

\frac{240}{4}

Cost of 8 kgs oranges =

\frac{240}{4} \times 8

= Rs. 480
Total cost = 720 + 2880 + 480 = Rs. 4080

65. The cost of 21 pencils and 9 clippers is Rs. 819. The cost price of 7 pencils and 3 clippers is = ?

A. Rs. 204

B. Rs. 409

C. Rs. 273

D. Rs. 208

Discuss

Solution:

Cost of 21 pencils and 9 clippers = Rs. 819
Cost of 7 pencils and 3 clippers =

\frac{819}{3}

= Rs. 273