A closed water tank has an internal size of $10 m \times 15 m \times 20 m$ . It needs to be lined with waterproofing cement on all its internal sides. At the rate of Rs. $250 per m^{2}$ , the total cost of lining will be Rs:

237, 500

No worries! We‘ve got your back. Try BYJU‘S free classes today!

325, 000

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

400, 000

No worries! We‘ve got your back. Try BYJU‘S free classes today!

475, 000

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $325, 000$
Total surface area of water tank
$= 2 (l b + b h + h l) = 2 (10 \times 15 + 15 \times 20 + 20 \times 10)$
$= 2 \times (150 + 300 + 200) = 2 \times 650$
$= 1300 m^{2}$

Cost of lining $= R s (250 \times 1300) = R s 325000$

Hence option $^{'} B^{'}$ is the answer.

Suggest Corrections

Similar questions

Q. A closed tea box has

47 c m \times 47 c m \times 60 c m

internal dimensions, then the total area of tin foil needed for lining it is

A house is in the shape of a cubical of length 20m, breadth 10m and height 5m. It has an opening of 2m $\times$ 2m on one of the walls for ventilation. Find the cost of cementing the walls of the house at Rs. 5 per $m^{2}$ .

Q. The diameter and height of a cylindrical tank are 7

m

and

9 m

respectively. If the inner side of the tank has to be painted all over, what will it cost at Rs

35

per square metre?

Q. A square water tank has its sides equal to

40 m

. There are four semicircular grassy plots all around it. Find the cost of turfind the plots at

R s . 1.25

per

s q . m

. (Take

π = 3.14

)

A conical tent is 15 m high and the radius of its base is 20 m. The cost of the canvas required to make the tent at the rate of Rs 7 per m² is

Join BYJU'S Learning Program

A closed water tank has an internal size of 10m×15m×20m. It needs to be lined with waterproofing cement on all its internal sides. At the rate of Rs. 250 per m2, the total cost of lining will be Rs:

The correct option is B 325,000Total surface area of water tank =2(lb+bh+hl)=2(10×15+15×20+20×10)=2×(150+300+200)=2×650=1300m2Cost of lining =Rs(250×1300)=Rs325000Hence option ′B′ is the answer.

A closed water tank has an internal size of $10 m \times 15 m \times 20 m$ . It needs to be lined with waterproofing cement on all its internal sides. At the rate of Rs. $250 per m^{2}$ , the total cost of lining will be Rs:

The correct option is B $325, 000$
Total surface area of water tank
$= 2 (l b + b h + h l) = 2 (10 \times 15 + 15 \times 20 + 20 \times 10)$
$= 2 \times (150 + 300 + 200) = 2 \times 650$
$= 1300 m^{2}$

Cost of lining $= R s (250 \times 1300) = R s 325000$

Hence option $^{'} B^{'}$ is the answer.