NCERT Solutions for Class 7 Maths Chapter 2 Exercise 2.3
In this exercise the student learn ncert solutions for class 7 maths chapter 2 (fractions and decimals) Exercise 2.3 .Student can download this solution in pdf . In this exercise we learn multiplication of fractions.
Question 5: Saili plants 4 saplings, in a row in her garden, the distance between two adjacent saplings is (3/4)m .Find the distance between the first and the last sapling.
Answer : Distance between each sapling is 3/4 m so, distance between first sapling to second sapling is 3/4 m, second sapling to third sapling is 3/4 m and third sapling to fourth(last ) sapling is 3/4 m
Hence Distance between first sapling to last sapling is (3/4) + (3/4) + (3/4) = 3*(3/4) m
= 9/4 m = 2(1/4) m
Question 6: lipika reads a book for [1(3/4)] hours everyday. She reads the entire book in 6 days. How many hours in all were required by her to read the book?
Answer : Lipika reads books each day = 1(3/4) hours = (7/4) hours
Hence her reading hours in 6 day = 6*(7/4) = (21/2) h = 10(1/2) h
Question 7: A car runs 16 km using 1 litre of petrol. How much distance will it cover using [2(3/4)] litre of petrol.
Answer : Car runs 16 km in 1 litre petrol ,so car runs in 2(3/4) litre petrol = 16*2(3/4) km
= 16*(11/4) km = 44 km.
Hence car runs 44 km in 2(3/4) litre petrol.