Question

3. 400 grams cake costs 80 rupees. How much would a 1.5 kg cake cost? - 300
4. A man earns 18000 in 3 months.
(0) How much time would he take to earn 30000?
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(1) How much money will he earn in 7 months?
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Answer 1

Answer:

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1.5 kg = 1500g. so, cost of 1 g = 80/400 rs. = 300 rs

Answer 2

Answer:

3) 400g=0.4kg

0.4kg costs 80 rupees

1.5 kg costs ...p rupees

now cross multiply .....p×0.4=1.5×80

p=(1.5×80)÷0.4

p=300

4)similarly

(0). 18000.....3 months

30000.....p months

cross multiply

p=3×30000)÷18000

p=5 months

(1). 18000......3 months

p.................7 months

cross multiply

p = (7×18000)÷3

p=42000 rs