Question

withdraw over these five days? 10. A shopkeeper purchased 144 pens at the rate of * 9 each and sold them at 11 each. What is his profit? 11. A cooling machine requires that room temperature be lowered from 52°C at the rate of 6°C every half an hour. What will be the room temperature in 5 hours after the process begins? 12. In an examination paper containing 20 questions, 3 marks are awarded for each correct or and marks for questions not attempted. Find​

Answer 1

Answer:

C.P. = Rs.(144*9) = Rs.1296

S.P. = Rs.(144*11) = Rs.1584

Profit = S.P. - C.P. = Rs.(1584 - 1296) = Rs.288

Step-by-step explanation:

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Answer 2

Answer:

10.➡️he purchase 1 pen in rs= 9

he sold one pen in rs= 11

11-9=2

total pen he buy =144×2=288 answer

11.➡️ i don't know

12.➡️not full questions

Step-by-step explanation:

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