Unitary Method


  1. 5 dozen toys are packed in a box and 98 boxes are kept in a tempo. How many tempos can lift 29400 toys in one round ?









  1. View Hint View Answer Discuss in Forum

    We know that , one dozen = 12 items ( toys )
    ∵ Five dozen = 5 × 12 = 60 toys
    ⇒ No. of toys can be kept in 1 box = 60
    ∴ No. of toys can be kept in 98 boxes = 60 × 98 = 5880
    ∵ 5880 toys can be lifted by = 1 tempo

    Correct Option: B

    We know that , one dozen = 12 items ( toys )
    ∵ Five dozen = 5 × 12 = 60 toys
    ⇒ No. of toys can be kept in 1 box = 60
    ∴ No. of toys can be kept in 98 boxes = 60 × 98 = 5880
    ∵ 5880 toys can be lifted by = 1 tempo

    ∴ 29400 toys can be lifted by =
    1
    × 29400
    5880

    Thus , 29400 toys can be lifted by = 5 tempos


  1. Cost of 7000 bricks is Rs. 5740. Cost of luggage to carry the bricks to the building place is Rs. 805. What is the cost at per thousand bricks ?









  1. View Hint View Answer Discuss in Forum

    Given that :- Cost of 7000 bricks = Rs. 5740.
    Cost of luggage to carry the bricks = Rs. 805
    ∵ Total cost of 7000 bricks = 5740 + 805 = Rs. 6545

    ⇒ Total cost of 1 brick = Rs.
    6545
    7000

    Correct Option: C

    Given that :- Cost of 7000 bricks = Rs. 5740.
    Cost of luggage to carry the bricks = Rs. 805
    ∵ Total cost of 7000 bricks = 5740 + 805 = Rs. 6545

    ⇒ Total cost of 1 brick = Rs.
    6545
    7000

    ∴ Total cost of 1000 bricks =
    6545
    × 1000
    7000

    Therefore , Total cost of 1000 bricks = Rs. 935



  1. 357 mangoes cost Rs. 1517·25, then what is the approximate cost of 49 dozen of mangoes ?









  1. View Hint View Answer Discuss in Forum

    ∵ 1 dozen = 12 items
    Here , 49 dozen = 49 × 12 = 588 mangoes
    ∵ The cost of 357 mangoes = Rs. 1517·25

    ⇒ The cost of 1 mango =
    1517·25
    = Rs. 4·25
    357

    ∴ The cost of 588 mangoes = 4·25 × 588 = Rs. 2499

    Correct Option: A

    ∵ 1 dozen = 12 items
    Here , 49 dozen = 49 × 12 = 588 mangoes
    ∵ The cost of 357 mangoes = Rs. 1517·25

    ⇒ The cost of 1 mango =
    1517·25
    = Rs. 4·25
    357

    ∴ The cost of 588 mangoes = 4·25 × 588 = Rs. 2499
    Thus , The cost of 588 mangoes ≅ Rs. 2500 (Approximately)


  1. If the weight of 13 meters long rod is 23·4 kg. What is the weight of 6 meters long rod ?









  1. View Hint View Answer Discuss in Forum

    Given that :- Weight of 13 m long rod = 23·4 kg

    ∴ Weight of 1 m long rod =
    23·4
    kg
    13

    ∴ Weight of 6 m long rod =
    23·4 × 6
    13

    Correct Option: B

    Given that :- Weight of 13 m long rod = 23·4 kg

    ∴ Weight of 1 m long rod =
    23·4
    kg
    13

    ∴ Weight of 6 m long rod =
    23·4 × 6
    13

    Therefore ,Weight of 6 m long rod = 10·8 kg



  1. If the cost of 3 dozens mangoes is Rs. 245, what will be the approximate cost of 363 mangoes ?









  1. View Hint View Answer Discuss in Forum

    We know that , One dozen = 12 items
    Three dozen = 3 × 12 = 36 items
    ∵ The cost of 36 mangoes = Rs. 245

    ∴ The cost of 1 mango = Rs.
    245
    36

    ∴ The cost of 363 mangoes = Rs.
    245
    × 363
    36

    Correct Option: C

    We know that , One dozen = 12 items
    Three dozen = 3 × 12 = 36 items
    ∵ The cost of 36 mangoes = Rs. 245

    ∴ The cost of 1 mango = Rs.
    245
    36

    ∴ The cost of 363 mangoes = Rs.
    245
    × 363
    36

    The cost of 36 mangoes = Rs. 2470·42
    Hence , The cost of 36 mangoes = Rs. 2400 (Approximately)