NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 3: Data Handling - Problems and Solutions
Question 85

Question. 85

Below is a list of 10 tallest buildings in India...

(a) Find the height of each storey of the three tallest buildings and write them.
(b) The average height of one storey for the buildings given in (a).
(c) Which city in this list has the largest percentage of skyscrapers?
(d) What is the range of data?
(e) Find the median of the data.
(f) Draw a bar graph for given data.

Answer:

(a) Heights per storey: MVRDC (4.45), Oberoi Woods (4.25), RNA Mirage (4.25), Planet (3.5), UB Tower (9.2), Ashok (3.9), Imperial I/II (4.15).
(b) 4.45
(c) Mumbai, 81.6%
(d) 93 m
(e) 192.5
(f) Draw bar graph

Detailed Answer with Explanation:

Range = 249−156 = 93. Median = avg of 5th and 6th terms. Mumbai has 8/10 = 81.6%.

NCERT Exemplar Solutions Class 7 – Mathematics – Unit 3: Data Handling – Problems and Solutions | Detailed Answers