Question

Mini ― "Come here! Come here! Take sardines at Rs 40 a kg".
Gracy ― "Never so cheap! Get sword-fish for Rs 60 a kg".
Floramma sells prawns for Rs 150 a kg.
Karuthamma sells squid for Rs 50 a kg.

Look, Fazila can hardly carry this big kingfish! She says, "This fish weighs 8 kg. I will sell the whole for Rs 1200".

Practice Time
(1) At what price per kg did Fazila sell the kingfish?
(2) Floramma has sold 10 kg prawns today. How much money did she get for that?
(3) Gracy sold 6 kg sword fish. Mini has earned as much money as Gracy. How many kg of sardines did Mini sell?
(4) Basheer has Rs 100. He spends one-fourth of the money on squid and another three-fourth on prawns.
(a) How many kilograms of squid did he buy?
(b) How many kilograms of prawns did he buy?

Answer 1

(1) Weight of the kingfish = 8 kg
Total cost of the kingfish = Rs 1200
Weight of 1 kg fish = 1200 ÷ 8
= 150

Fazila sells the kingfish at Rs 150 per kg.


(2) Weight of prawns sold by Floramma = 10 kg
Cost of 1 kg prawns = Rs 150
Price of 10 kg prawns = Rs 150 $\times$ 10
= Rs 1500

Floramma got Rs 1500 by selling 10 kg prawns.

(3) Weight of swordfish sold by Gracy = 6 kg
Cost of 1 kg swordfish = Rs 60
Total money Gracy earned by selling 6 kg of swordfish = Rs 60 $\times$ 6
= Rs 360

Mini earned Rs 360 by selling sardines.

Cost of 1 kg sardines = Rs 40
Weight of sardines sold by Mini = 360 ÷ 40
= 9 kg

Mini sold 9 kg sardines and earned Rs 360.

(4) Total money with Basheer = Rs 100
One-fourth of the money = Rs 100 ÷ 4
= Rs 25

Remaining three-fourth of the money = Rs 100 − Rs 25
= Rs 75

(a) He bought squid for Rs 25.
Cost of 1 kg squid = Rs 50
Now, cost of $\frac{1}{2}$ kg squid = Rs 50 ÷ 2
= Rs 25

Basheer can buy $\frac{1}{2}$ kg squid with Rs. 25.

(b) He bought prawns for Rs 75.
Cost of 1 kg prawns = Rs 150
Cost of $\frac{1}{2}$ kg prawns = Rs 150 ÷ 2
= Rs 75

Basheer can buy $\frac{1}{2}$ kg prawns with Rs. 75.