Discussion of Question with ID = 018 under Basic-Simplification

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Question

Cost of 1 kg of a metal is Rs. $21{1/2}$. What is the cost of ${42/43}$ kg?

A

Rs. 21.

B

Rs. 22.

C

Rs. 20.

D

Rs. 23.

Soln.
Ans: a

We have to find $21{1/2}$ × ${42/43}$, which can be written as ${43/2}$ × ${42/43}$, which simplifies to 42/2 = Rs. 21.


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