If Pankaj’s father bought type-II tank and wants to cover it with a cloth that costs ?45 per m², then find the total cost of cloth used (if all the faces of tank are covered with cloth).

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Solution

Q.
Pankaj’s father needs to purchase a new water tank for irrigating the fields. To find the right one, they visit a shop. The shopkeeper shows them three different types of water tanks, as shown below.

Based on the above information, answer the following questions:

(ii) If Pankaj’s father bought type-II tank and wants to cover it with a cloth that costs $R s 45 p e r m^{²}$ , then find the total cost of cloth used (if all the faces of tank are covered with cloth).

1 4635

2 4435

3 4530

4 4630

Ans.
(1)

Total Surface Area (TSA) of type-II tank

$TSA = 2 (l b + b h + h l)$

$= 2 (5 \times 4 + 4 \times 3.5 + 3.5 \times 5)$

$= 2 (20 + 14 + 17.5) = 103 m^{2}$

$C o s t o f c l o t h r e q u i r e d : = R s (45 \times 103) = R s 4635$

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