Multiple choice

The cost of digging a pit was Rs 1,347. How much will it cost (approximately)if the wages of workmen per day has been increased by 1/8 of their former wage and working time decreased by 1/21 of the former time? (Note:- except above information other things remain unchanged )

  1. 1401

  2. 1421

  3. 1443

  4. 1479
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

New cost = Old cost * (1 + 1/8) * (1 - 1/21) = 1347 * (9/8) * (20/21) = 1347 * (180/168) = 1347 * (15/14) = 1443.21.

AI explanation

The total cost equals the number of workmen multiplied by their daily wage and the total working days. The new daily wage becomes 9/8 of the former wage and the new working time becomes 20/21 of the former time. The new cost is calculated as 1347 multiplied by 9/8 and by 20/21, which equals 1443. The approximate cost will be Rs 1443.

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