Question

1. A cord of length 143/2 m has been cut into 26 pieces of equal length. What is the length of each piece?
2. Petrol at a place costs 187/4 Rs/litre. What is the cost of 35 litres of petrol?

CBSE MATH RATIONAL NUMBERS GRADE 7

Answer 1

1.

total length of cord = 143/2 m

number of pieces = 26

$length \: of \: each \: piece \\ = (143 \div 2) \div 26m \\ = 71.5 \div 26m \\ = 2.75m$

2.
cost of 1 litre petrol
= 187/4
= 46.75
cost of 35 litre petrol.
=46.75*35
=1636.28rs