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1. Study the bar chart given below and answer the following questions:
Income and Expenditure (in Rs. crore) in 2001 of five companies

For company R if the expenditure had increased by 20% in the year 2001 from the year 2000 and the company had earned profit of 10% in 2000, the company’s income in 2000 was (in Rs. crore).

A. 41.25 crores

B. 35.75 crores

C. 37.25 crores

D. 38.5 crores

Solution:

Expenditure of company R in 2000

\begin{aligned} = \frac{45 \times 100}{120} \\ = Rs. 37.5 crores \end{aligned}

Let the income of company in 2000 be Rs.

x

crores

\begin{aligned} ∴ 10 = \frac{x - 37.5}{37.5} \times 100 \\ \Rightarrow x - 37.5 = \frac{37.5 \times 10}{100} \\ \Rightarrow x - 37.5 = 3.75 \\ \Rightarrow x = 37.5 + 3.75 \\ \Rightarrow x = Rs. 41.25 crores \end{aligned}

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